[PATCH 0/1] MR4434: winex11: Free correct pointer when using xf86vm

[Fabian Maurer (＠DarkShadow44)]

After allocation the pointer gets shifted by sizeof(xf86vm_modes),
so we have to undo that before calling free.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=55909