Xvideo: Use YUV mode from primary Xv adapter rather than RGB mode from non-primary adapter. Fixes Intel adapter black screen. Also Xv's sync on vblank is now cfg param and disabled by default.

git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@88391 e17a0e51-4ae3-4d35-97c3-1a29b211df97
GTK: memleak fix and no warn about incompatible parameter.

git-svn-id: https://pcsxr.svn.codeplex.com/svn/pcsxr@88392 e17a0e51-4ae3-4d35-97c3-1a29b211df97