Squashed 'external/toxcore/c-toxcore/' changes from 1701691d5..640e6cace

640e6cace fix(toxav): remove extra copy of video frame on encode Tested and works, but there might be alignment issues and other stuff.
6f7f51554 chore(toxav): use realtime deadline for vp8 encoder Technically all this does is choose a quality based on frame duration, which we always set to 1, and as such is always realtime. (In same timebase as pts, which we use as a frame counter...)
5047ae5a2 chore: make the source tarball exhibit the old behavior
14804a4b8 chore: Fix sonar-scan CI action.
e2db7d946 cleanup: Exclude lan_discovery test from running on macos, instead of excluding it from the project.
3accade67 chore: Fix CI, disabling some tests that no longer run on CI.
ef8d767e6 cleanup: Fix comment formatting errors.
34ec822da cleanup: Fix some clang-19 format warnings.
40b3f0b46 refactor: Use clang's nullability qualifiers instead of attributes.
f81e30679 refactor: Use per-parameter nullability annotations.
REVERT: 1701691d5 chore(toxav): use realtime deadline for vp8 encoder Technically all this does is choose a quality based on frame duration, which we always set to 1, and as such is always realtime. (In same timebase as pts, which we use as a frame counter...)
REVERT: a87505867 fix(toxav): remove extra copy of video frame on encode Tested and works, but there might be alignment issues and other stuff.

git-subtree-dir: external/toxcore/c-toxcore
git-subtree-split: 640e6cace81b4412c45977b94eb9c41e53c54035

toxcore/mem.c

@@ -10,26 +10,22 @@
 #include "attributes.h"
 #include "ccompat.h"
 
-nullable(1)
-static void *sys_malloc(void *obj, uint32_t size)
+static void *sys_malloc(void *_Nullable obj, uint32_t size)
 {
     return malloc(size);
 }
 
-nullable(1)
-static void *sys_calloc(void *obj, uint32_t nmemb, uint32_t size)
+static void *sys_calloc(void *_Nullable obj, uint32_t nmemb, uint32_t size)
 {
     return calloc(nmemb, size);
 }
 
-nullable(1, 2)
-static void *sys_realloc(void *obj, void *ptr, uint32_t size)
+static void *sys_realloc(void *_Nullable obj, void *_Nullable ptr, uint32_t size)
 {
     return realloc(ptr, size);
 }
 
-nullable(1, 2)
-static void sys_free(void *obj, void *ptr)
+static void sys_free(void *_Nullable obj, void *_Nullable ptr)
 {
     free(ptr);
 }