shell: Make sure we still have touch or pointer focus when moving/resizing
It's possible to touch a surface to move it and let go before we get
to common_surface_move(), in which case we don't have a touch focus
when we get there. For pointers, we could click a surface, but have the
surface go away before we get to common_surface_move(), in which
case the button count is non-zero, but we don't have a surface.
In either case we crash, so let's add a check to make sure we still
have a focus surface before we try to move it.
Closes: https://bugs.freedesktop.org/show_bug.cgi?id=73448
1 file changed