At the core level, the 'f' hotkey and the double click are managed in a
slightly different way. The former sets up both the playlist and the vout
"fullscreen" variables whereas the latter only sets up the vout variable.

This patch first relies on the vout state if any, and falls back to the
playlist state. This ensures that the fullscreen button always works
consistently for the user. Otherwise, user needs to press twice instead
of once when the playlist and the vout are no longer in sync (after a double
click)

macosx: dialogs provider: fix crash for question dialog and also improve robustness of other dialogs

as reported on the forum at http://forum.videolan.org/viewtopic.php?f=26&t=111572

plus factorise some code.

This fixes a bug reported on the forum at
http://forum.videolan.org/viewtopic.php?f=26&t=111572

Close: #8830

If a pre-2.1 version is detected it will be uninstalled silently before
proceeding.

just widgets

Signed-off-by: Rémi Denis-Courmont <remi@remlab.net>

macosx: delay start in fullscreen animation to allow to finish resize animation before (close #8780)

This is just quick fix and workaround for now.

Should Fix #8619 and #8713

This reverts commit 32ce763b.

This forces Lua RC to exit cleanly in all cases.

When calling vlc_va_Get() failed inside ffmpeg_GetFrameBuf(), then
the error messages says "vaGrabSurface failed" however it should
say "vlc_va_Get failed". Since hw accelerators are called through a
vlc abstraction defined in va.h. It originated from libva (VAAPI),
but it includes VDPAU and DXVA2 now.