gst/gstelement.*: Deprecated gst_element_get_pad() as it can't be used sanely. It's not clear of the reference to the...

Original commit message from CVS:
* gst/gstelement.c:
* gst/gstelement.h:
Deprecated gst_element_get_pad() as it can't be used sanely. It's not
clear of the reference to the resulting pad must be released later
or not, resulting in possible leaks. Fixes bug #533865.