gst/: remove now useless and leaky resurrection code in dispose

gst/: remove now useless and leaky resurrection code in dispose

Original commit message from CVS:

* gst/gstbin.c: (gst_bin_dispose):
* gst/gstelement.c: (gst_element_dispose):
remove now useless and leaky resurrection code in dispose
* gst/base/gstbasesrc.c: (gst_base_src_init):
* gst/gstelementfactory.c: (gst_element_factory_create):
* gst/gstobject.c: (gst_object_set_parent):
add some debugging