wsi/x11: cleanup properly after mit shm paths are used.
This path was being skipped on sw + has_mit_shm, when it shouldn't be.
Fixes: a069b4e9 ("vulkan/wsi/sw: add mit-shm support for pixmap allocation")
Due to an influx of spam, we have had to impose restrictions on new accounts. Please see this wiki page for instructions on how to get full permissions. Sorry for the inconvenience.
This path was being skipped on sw + has_mit_shm, when it shouldn't be.
Fixes: a069b4e9 ("vulkan/wsi/sw: add mit-shm support for pixmap allocation")