Fix paraview version finding

Disables reading out paraview enviroment variables. However, whatever we were
trying to do is undocumented as far as I can tell.

cmake/FindParaView.cmake

@@ -13,14 +13,18 @@ if (PVPYTHON_EXEC)
     ERROR_STRIP_TRAILING_WHITESPACE)
   string(REPLACE "\n" ";" _OUTPUT "${_OUTPUT}")
   list(LENGTH _OUTPUT _OUTPUT_LENGTH)
-  if (_OUTPUT_LENGTH EQUAL 1)
-    # '--print' is not supported, just get the version
-    list(GET _OUTPUT 0 PARAVIEW_VERSION)
-  elseif(_OUTPUT_LENGTH EQUAL 2)
-    # '--print' is supported, get the version and environment variables
-    list(GET _OUTPUT 0 PARAVIEW_PYTHON_ENV_VARS)
-    list(GET _OUTPUT 1 PARAVIEW_VERSION)
-  endif()
+  foreach(_ENTRY ${_OUTPUT})
+    string(FIND "${_ENTRY}" "paraview version " _VERSION_FOUND)
+    if(NOT ${_VERSION_FOUND} EQUAL -1)
+      set(PARAVIEW_VERSION ${_ENTRY})
+    endif()
+    # Note: we used to set PARAVIEW_PYTHON_ENV_VARS if an entry in the list
+    # wasn't the version.This doesn't work because if you run pvpython
+    # without a mpirun on an mpi build of paraview then you get additional
+    # output that isn't environment variables. We need a separate way of
+    # handling whatever --print does. However, I (Nils Deppe) can't find this
+    # flag as documented.
+  endforeach()
   string(REPLACE "paraview version " "" PARAVIEW_VERSION "${PARAVIEW_VERSION}")
 endif()