plugins: Suppress warnings about implicit integer downcasts

Returned values are usually 64-bit in length but commonly stored in
16-bit integers anyway.

plugins/aja/CMakeLists.txt

@@ -58,7 +58,7 @@ elseif(OS_MACOS)
   find_library(APPKIT AppKit)
 
   target_link_libraries(aja PRIVATE ${IOKIT} ${COREFOUNDATION} ${APPKIT})
-  target_compile_options(aja PRIVATE -Wno-error=deprecated-declarations)
+  target_compile_options(aja PRIVATE -Wno-error=deprecated-declarations -Wno-shorten-64-to-32)
 elseif(OS_LINUX OR OS_FREEBSD)
   target_compile_options(aja PRIVATE -Wno-error=deprecated-declarations)
 endif()

plugins/decklink/CMakeLists.txt

@@ -62,6 +62,7 @@ elseif(OS_MACOS)
   mark_as_advanced(COREFOUNDATION)
 
   target_sources(decklink PRIVATE mac/platform.cpp)
+  target_compile_options(decklink PRIVATE -Wno-shorten-64-to-32)
   target_link_libraries(decklink PRIVATE ${COREFOUNDATION})
 
   target_sources(

plugins/obs-ffmpeg/CMakeLists.txt

@@ -45,6 +45,7 @@ target_sources(
           obs-ffmpeg-video-encoders.c
           obs-ffmpeg.c)
 
+target_compile_options(obs-ffmpeg PRIVATE $<$<COMPILE_LANG_AND_ID:C,AppleClang,Clang>:-Wno-shorten-64-to-32>)
 target_compile_definitions(obs-ffmpeg PRIVATE $<$<BOOL:${ENABLE_FFMPEG_LOGGING}>:ENABLE_FFMPEG_LOGGING>)
 
 target_link_libraries(

plugins/vlc-video/CMakeLists.txt

@@ -31,6 +31,7 @@ add_library(vlc-video MODULE)
 add_library(OBS::vlc-video ALIAS vlc-video)
 
 target_sources(vlc-video PRIVATE vlc-video-plugin.c vlc-video-plugin.h vlc-video-source.c)
+target_compile_options(vlc-video PRIVATE $<$<COMPILE_LANG_AND_ID:C,AppleClang,Clang>:-Wno-shorten-64-to-32>)
 target_link_libraries(vlc-video PRIVATE OBS::libobs)
 
 check_vlc_path()