GCC 12 use-after-free false positives

[Fabian Maurer]

When using GCC 12, there's two bogus warnings in Wine's code:

../wine-git/dlls/winex11.drv/clipboard.c: In function 
‘X11DRV_CLIPBOARD_GetProperty’:
../wine-git/dlls/winex11.drv/clipboard.c:1871:13: error: pointer ‘val’ may be 
used after ‘realloc’ [-Werror=use-after-free]
 1871 |             free( val );
      |             ^~~~~~~~~~~
../wine-git/dlls/winex11.drv/clipboard.c:1866:17: note: call to ‘realloc’ here
 1866 |         *data = realloc( val, pos * sizeof(int) + count + 1 );
      |                 ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

There is no real issue here, it's just a false positive.

This could be worked around using a temporary void* variable to hold the 
result from realloc.
Is this worth it or would you wait for gcc to fix their warning?

Regards,
Fabian Maurer