compile warnings in chgres_cube

[edwardhartnett]

@GeorgeGayno-NOAA seems like many of these would be trivially easy to fix:

/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:307:2:

  307 |          if (trim(grib2_file_input_grid) == "NULL" .or. trim(grib2_file_input_grid) == "") then
      |         1
Warning: Nonconforming tab character at (1) [-Wtabs]
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:308:2:

  308 |                  call error_handler("FOR GRIB2 DATA, PLEASE PROVIDE GRIB2_FILE_INPUT_GRID", 1)
      |                1
Warning: Nonconforming tab character at (1) [-Wtabs]
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:309:2:

  309 |          endif
      |         1
Warning: Nonconforming tab character at (1) [-Wtabs]
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:317:2:

  317 |          if (.not. any((/character(4)::"GFS","NAM","RAP","HRRR"/)==trim(external_model))) then
      |         1
Warning: Nonconforming tab character at (1) [-Wtabs]
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:318:2:

  318 |                  call error_handler( "KNOWN SUPPORTED external_model INPUTS ARE GFS, NAM, RAP, AND HRRR. " // &
      |                1
Warning: Nonconforming tab character at (1) [-Wtabs]
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:324:2:

  324 |          endif
      |         1
Warning: Nonconforming tab character at (1) [-Wtabs]
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:333:2:

  333 |          if (trim(geogrid_file_input_grid) == "NULL" .or. trim(grib2_file_input_grid) == "") then
      |         1
Warning: Nonconforming tab character at (1) [-Wtabs]
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:334:2:

  334 |                  print*, "HRRR DATA DOES NOT CONTAIN SOIL TYPE INFORMATION. WITHOUT &
      |                1
Warning: Nonconforming tab character at (1) [-Wtabs]
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:336:4:

  336 |                         ACCURATE. "
      |                         1
Warning: Missing ‘&’ in continued character constant at (1) [-Wampersand]
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:337:2:

  337 |          endif
      |         1
Warning: Nonconforming tab character at (1) [-Wtabs]
/usr/local/bin/cmake -E touch sorc/grid_tools.fd/regional_esg_grid.fd/CMakeFiles/regional_esg_grid.dir/pmat5.f90.o.provides.build
/usr/local/bin/cmake -E cmake_copy_f90_mod sorc/grid_tools.fd/regional_esg_grid.fd/pesg.mod sorc/grid_tools.fd/regional_esg_grid.fd/CMakeFiles/regional_esg_grid.dir/pesg.mod.stamp GNU
/usr/local/bin/cmake -E touch sorc/grid_tools.fd/regional_esg_grid.fd/CMakeFiles/regional_esg_grid.dir/pesg.f90.o.provides.build
[ 22%] Building Fortran object sorc/grid_tools.fd/regional_esg_grid.fd/CMakeFiles/regional_esg_grid.dir/regional_esg_grid.f90.o
cd /home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/build/sorc/grid_tools.fd/regional_esg_grid.fd && /usr/bin/mpifort  -I/usr/include -g -fprofile-arcs -ftest-coverage -O0 -Wall -g -fbacktrace -fallow-argument-mismatch -fallow-invalid-boz -ggdb -c /home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/grid_tools.fd/regional_esg_grid.fd/regional_esg_grid.f90 -o CMakeFiles/regional_esg_grid.dir/regional_esg_grid.f90.o
[ 22%] Linking Fortran executable regional_esg_grid
cd /home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/build/sorc/grid_tools.fd/regional_esg_grid.fd && /usr/local/bin/cmake -E cmake_link_script CMakeFiles/regional_esg_grid.dir/link.txt --verbose=1
/usr/bin/mpifort -g -fprofile-arcs -ftest-coverage -O0 -Wall -g -fbacktrace -fallow-argument-mismatch -fallow-invalid-boz -ggdb CMakeFiles/regional_esg_grid.dir/pesg.f90.o CMakeFiles/regional_esg_grid.dir/pfun.f90.o CMakeFiles/regional_esg_grid.dir/pietc.f90.o CMakeFiles/regional_esg_grid.dir/pietc_s.f90.o CMakeFiles/regional_esg_grid.dir/pkind.f90.o CMakeFiles/regional_esg_grid.dir/pmat.f90.o CMakeFiles/regional_esg_grid.dir/pmat2.f90.o CMakeFiles/regional_esg_grid.dir/pmat4.f90.o CMakeFiles/regional_esg_grid.dir/pmat5.f90.o CMakeFiles/regional_esg_grid.dir/psym2.f90.o CMakeFiles/regional_esg_grid.dir/regional_esg_grid.f90.o -o regional_esg_grid  /usr/lib/x86_64-linux-gnu/libnetcdff.so -L/usr/lib/x86_64-linux-gnu -lnetcdff -Wl,-Bsymbolic-functions -flto=auto -ffat-lto-objects -flto=auto -Wl,-z,relro -Wl,-z,now -lnetcdf -lnetcdf -lm /usr/lib/x86_64-linux-gnu/libnetcdf.so -L/usr/lib/x86_64-linux-gnu -L/usr/lib/x86_64-linux-gnu/hdf5/serial -lnetcdf 
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:475:59:

  475 |     if(present(this_miss_var_value)) this_miss_var_value = missing_var_values(i)
      |                                                           1
Warning: Possible change of value in conversion from REAL(8) to REAL(4) at (1) [-Wconversion]
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90: In function ‘__program_setup_MOD_read_setup_namelist’:
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/program_setup.F90:198:30: warning: ‘.filename_to_use’ may be used uninitialized [-Wmaybe-uninitialized]
  198 |     filename_to_use = filename
      |                              ^
[ 22%] Building Fortran object sorc/chgres_cube.fd/CMakeFiles/chgres_cube_lib.dir/search_util.F90.o
cd /home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/build/sorc/chgres_cube.fd && /usr/bin/mpifort  -I/home/runner/g2/include_d -I/usr/include -I/home/runner/nemsio/include -I/home/runner/sfcio/include -I/home/runner/sigio/include -I/home/runner/bacio/include_4 -I/home/runner/ip/include_d -I/home/runner/sp/include_d -I/home/runner/w3nco/include_d -I/home/runner/esmf/mod -I/home/runner/esmf/include -g -fprofile-arcs -ftest-coverage -O0 -Wall -g -fbacktrace -fallow-argument-mismatch -fallow-invalid-boz -ffree-line-length-0 -fdefault-real-8 -fallow-argument-mismatch -ggdb -Jmod -c /home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/search_util.F90 -o CMakeFiles/chgres_cube_lib.dir/search_util.F90.o
/home/runner/work/UFS_UTILS/UFS_UTILS/ufs_utils/sorc/chgres_cube.fd/search_util.F90:46:49:

   46 |  subroutine search (field, mask, idim, jdim, tile, field_num, latitude, terrain_land, soilt_climo)
      |                                                 1
Warning: Unused dummy argument ‘tile’ at (1) [-Wunused-dummy-argument]

[GeorgeGayno-NOAA]

The branch at 4a67a13 was compiled with no warnings on Hera using the GNU compiler and these options: set(CMAKE_Fortran_FLAGS_DEBUG "-ggdb -Wall")