gst/: Use GST_DEBUG_FUNCPTR() more extensively.

gst/: Use GST_DEBUG_FUNCPTR() more extensively.

Original commit message from CVS:
* gst/base/gstcollectpads.c: (gst_collectpads_add_pad):
* gst/elements/gstfilesink.c: (gst_file_sink_init):
* gst/elements/gsttypefindelement.c: (gst_type_find_element_init):
* gst/gstghostpad.c: (gst_ghost_pad_set_internal),
(gst_ghost_pad_init), (gst_ghost_pad_new_notarget):
* gst/gstpad.c: (gst_pad_init):
Use GST_DEBUG_FUNCPTR() more extensively.