Revert [22699] for POTFILES.in. the make update-po rule seems to be broken on MacOSX as it's the second times that when feepk update POTFILES.in all the files in modules/ disappear

Tested with dirac files created by ffmpeg (by means of dirac support ffmpeg patch).

contrib/ffmpeg: Yet an other fix attempt for ffmpeg. (Previous fix is broken because of registers don't get reseted properly in the look).

qt4: control_(Add/Remove/Exists) are not ready yet. (and btw, the previous commit also introduced last.fm settings in the simple preferences)

Qt4 - make the Browse Device button to actually do something. Fix Trax#49. This has to be checked when you want to open a VIDEO_TS folder (reading V_T or V_T/.. ?)

Add support for converting RGBA into YUVA using ffmpeg libswscale capabilities when available. This makes the Teletext subtitles streamable with dvbsub encoder/decoder.

xspf writer: forget to increment the source pointer in [22665], that would result in file://file://file:///path/to/input entries in ml.xspf

telepathy: register the callbacks only when we are connected to the bus, to avoid the module being unloaded, while the callbacks are still active

Fixed use of uninitialized data for CC detection.