gst/auparse/gstauparse.*: Use gst_object_unref() for GstObjects instead of g_object_u...

gst/auparse/gstauparse.*: Use gst_object_unref() for GstObjects instead of g_object_unref() and fix a mem leak in a d...

Original commit message from CVS:
* gst/auparse/gstauparse.c: (gst_au_parse_base_init),
(gst_au_parse_class_init), (gst_au_parse_init),
(gst_au_parse_dispose), (gst_au_parse_chain),
(gst_au_parse_change_state), (plugin_init):
* gst/auparse/gstauparse.h:
Use gst_object_unref() for GstObjects instead of
g_object_unref() and fix a mem leak in a debug
statement; while we're at it, also borgify, use
boilerplate macros and clean up a little bit.