GStreamer: add missing breaks in QGstreamerRecorderControl.

Task-number: QTBUG-34914
Change-Id: I8237201cb656a3cde23e3d750939fe11e35519cd
Reviewed-by: Robin Burchell <robin+qt@viroteck.net>
PulseAudio: fix crash when failing to create a context.

Don't try to call a function on a null PulseAudio context.
If pa_context_new() fails, we now try again to connect to the pulse
audio daemon later.

Task-number: QTBUG-35456
Change-Id: I0b848d3f25f57651ab31b9eca7ceb1bc9df2f682
Reviewed-by: Christian Stromme <christian.stromme@digia.com>
Fixed some documentation for VideoOutput qml type.

mapPointToSource() and mapPointToSourceNormalized() were documented with
the wrong name.

Change-Id: Ia128f698a02f1c865bc27443ef2c6cef8fc7a720
Reviewed-by: Christian Stromme <christian.stromme@digia.com>