* store the value of 'macosx-black' as one of VLCWindow's properties to prevent rare crashes when en-/disabling vout-filters or leaving/entering fullscreen-mode really fast.

When going to fast to fullscreen/windowed-mode VLC can still crash (now at vout.m:375), but that scenario isn't realistic because you need to perform this function at least 5 to 10 times per second to get this done.