gst/playback/gstdecodebin2.c: Decodebin2 doesn't unref pads it obtains in some occasions:

gst/playback/gstdecodebin2.c: Decodebin2 doesn't unref pads it obtains in some occasions:

Original commit message from CVS:
Patch by: Tommi Myöhänen <ext-tommi dot myohanen at nokia dot com>
* gst/playback/gstdecodebin2.c: (connect_pad), (expose_pad),
(deactivate_free_recursive):
Decodebin2 doesn't unref pads it obtains in some occasions:
- multiqueue src pads, when either connecting further or exposing
- sink pads of new autoplugged elements
- peer pads when recursively freeing elements
Fixes #425455.