Also fixes a crash on startup with '--disable-rgui'.
Thread 1 "retroarch" received signal SIGSEGV, Segmentation fault.
0x0000000000529f52 in strlcpy_retro__ (dest=0x7fffffffbb17 "treaming_toggle",
source=0x1 <error: Cannot access memory at address 0x1>, size=250)
at libretro-common/compat/compat_strl.c:38
38 while (--n && (*dest++ = *source++)) src_size++;
(gdb) bt
dest=0x7fffffffbb17 "treaming_toggle",
source=0x1 <error: Cannot access memory at address 0x1>, size=250)
at libretro-common/compat/compat_strl.c:38
size=250) at libretro-common/compat/compat_strl.c:60
out_path=0x7fffffffbb10 "input_", dir=0x94b460 "input", path=0x0,
delim=95 '_', size=256) at libretro-common/file/file_path.c:964
prefix=0x94b460 "input", btn=0x0, bind=0x151e180 <input_autoconf_binds+4672>)
at input/input_driver.c:2483
binds=0x151cf40 <input_autoconf_binds>) at tasks/task_autodetect.c:172
params=0x26adb40, task=0x26b74f0) at tasks/task_autodetect.c:252
params=0x26adb40, task=0x26b74f0) at tasks/task_autodetect.c:393
at tasks/task_autodetect.c:851
at libretro-common/queues/task_queue.c:182
at libretro-common/queues/task_queue.c:609
at frontend/frontend.c:146
at frontend/frontend.c:170
Fixes https://github.com/libretro/RetroArch/issues/7893
`menu_animation_update` enumerates `menu_animation.list` to process each
`tween`. It was observed that some tweens execute a callback that
pushes more animations via `menu_animation_push`. During the push, if
the tween `list` does not have enough space, a `realloc` occurs,
potentially invalidating the existing list. The remaining pointer access
in menu_animation_update is therefore invalid. Best case is the memory
is unused and thus does not affect the program. Worst case is memory
corruption.
