ext/ffmpeg/gstffmpegcodecmap.c: Fix quicktime type recognition in ffmpeg. We returned a bogus caps, which caused ffde...

Original commit message from CVS:
* ext/ffmpeg/gstffmpegcodecmap.c: (gst_ffmpeg_formatid_to_caps):
Fix quicktime type recognition in ffmpeg. We returned a bogus
caps, which caused ffdemux_quicktime to be chosen over qtdemux.
This fixes that.