ext/esd/esdsink.c: Use a finalize function, not dispose, and more importantly, call...

ext/esd/esdsink.c: Use a finalize function, not dispose, and more importantly, call the parent class finalize functio...

Original commit message from CVS:
* ext/esd/esdsink.c: (gst_esdsink_class_init),
(gst_esdsink_finalize):
Use a finalize function, not dispose, and more importantly,
call the parent class finalize function too