Patches to support gcc-15 and -std=c23

[heitbaum]

These patches allow these addons to be compiled by a c23 (gcc-15) compiler. Only patches that can’t / won’t be in upstream because of maintenance have been included in this PR. Ongoing upstreaming is being done with all the other gcc-15 required changes packages.

Expecting that all the other packages will be gcc-15 ready dependent on patches being accepted and their release schedules.
Only the following packages have yet to be made gcc-15/c23 ready

• librespot
  • Build failure with gcc-15 aws/aws-lc-rs#623
  • Update aws-lc-rs to 1.12.0, and aws-lc-sys to 0.24.0 librespot-org/librespot#1426
• inputstream.adaptive - [Bug] Compile error with gcc-15 xbmc/inputstream.adaptive#1739
• imagedecoder.heif - compile error with gcc-15 strukturag/libheif#1421
• game.libretro.tyrquake - Build fails with gcc-15 / std=c23 libretro/tyrquake#134

others

• grub
  • https://savannah.gnu.org/bugs/?66470
  • https://lists.gnu.org/archive/html/bug-gnulib/2024-12/index.html
  • X
• libxcrypt
  • Compile error with gcc 15-20241117 -Wunterminated-string-initialization besser82/libxcrypt#194
• glibc
• cifs-utils
• libtirpc

Changes in this PR

• comskip: fix gcc-15 build
  • non current (so local patch warranted)
• dtach: fix gcc-15 build
  • unmaintained upstream fix gcc-15 build crigler/dtach#21
• usb-modeswitch: fix gcc-15 build
  • upstreamed https://www.draisberghof.de/usb_modeswitch/bb/viewtopic.php?t=3122
• tstools: fix gcc-15 build
  • unmaintained upstream fix build with gcc-15 kynesim/tstools#44
• t2scan: fix gcc-15 build
  • unmaintained upstream t2scan: fix -std=c23 build failure mighty-p/t2scan#17
• iftop: fix gcc-15 build
  • unmaintained upstream - no access to git repo
• dvbsnoop: fix gcc-15 build
  • upstream fix build with gcc 15 Duckbox-Developers/dvbsnoop#4
• w_scan: fix gcc-15 build
  • unmaintained upstream
• tvheadend42: fix gcc-15 build
  • unmaintained upstream 4.2 version