gst/gstxml.c: Chain up to parent class in dispose function and also unref the elements in the toplevel_elements GList.
Original commit message from CVS:
* gst/gstxml.c: (gst_xml_dispose), (gst_xml_parse_file),
(gst_xml_parse_memory), (gst_xml_get_element):
Chain up to parent class in dispose function and also
unref the elements in the toplevel_elements GList.
Don't leak XmlDocPtr in _parse_file() and _parse_memory().
Always return a reference in gst_xml_get_element() rather
than only sometimes.
* tools/gst-launch.c: (xmllaunch_parse_cmdline):
Don't leak GstXml object.