gst/gstbin.c: Fix typo in docs.

Original commit message from CVS:
* gst/gstbin.c:
Fix typo in docs.

* gst/gstelement.c: (gst_element_commit_state):
Remove unused value.

* gst/gstiterator.c:
Mention that the returned element is reffed in the docs.
4 files changed