interleave: Add missing break in switch statement

The caps query is handled entirely already before.

CID #1139757
osxvideosink: advertize video meta API support

https://bugzilla.gnome.org/show_bug.cgi?id=726737
osxvideosink: use the video frame API instead of the video meta API

https://bugzilla.gnome.org/show_bug.cgi?id=726738
qtdemux: Properly return stream flags when parsing trex atom

https://bugzilla.gnome.org/show_bug.cgi?id=727867
souphttpsrc: Use GST_FLOW_FLUSHING when flushing, not GST_FLOW_EOS

... and reset it properly after flushing is done. Fixes playback
in many cases when buffering is used.

https://bugzilla.gnome.org/show_bug.cgi?id=727821