Close #1699 for Qt.

Spotted-by: Cristian Secară

Correctly detect unsupported AR.

Fix the output order on new slice.

Fixes a crash in Close() of the module.

Properly lock spu variable inside UpdateSPU.

No, locking is NOT something you can just igore !

chance to get a frame when they ask (close #1738).

Decoders and filters share the same pool of video frames. But the
decoders try to decode as fast as possible, using all buffers. Then it
s pure luck if the filter can grab a frame...

win installer: partially revert [902be08a]. That option is saved, and I agree with courmisch that the question needs to be asked again.

shoutcast sd: Change French TV section to use vlc://nop instead of vlc:skip (like XSPF was changed).

* change vlc:quit -> vlc://quit
* add --no-qt-privacy-ask to the reset shortcut
* change the wxwin shortcut to qt.

variables: Don't sort the choice list here. Because, the algo is bad and because we can't set the order of the list ourselves then.