Use after free warning

[N-R-K]

The following warning is emitted when trying to compile on gcc 12.1.1:

xdo.c: In function 'xdo_get_active_modifiers':
xdo.c:1664:17: warning: pointer 'keys' used after 'realloc' [-Wuse-after-free]
 1664 |           *keys = realloc(keys, keys_size * sizeof(charcodemap_t));
      |           ~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
xdo.c:1664:19: note: call to 'realloc' here
 1664 |           *keys = realloc(keys, keys_size * sizeof(charcodemap_t));
      |                   ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

xdotool/xdo.c

Line 1664 in df94eb6

*keys = realloc(keys, keys_size * sizeof(charcodemap_t));

It appears to me that it should've been realloc(*keys, ...) and not realloc(keys, ...). (And even that would incorrect as that assumes that realloc always succeeds).