gst/schedulers/gstoptimalscheduler.c: Don't try to follow the pad connections with...

gst/schedulers/gstoptimalscheduler.c: Don't try to follow the pad connections with other groups when a loop based ele...

Original commit message from CVS:
* gst/schedulers/gstoptimalscheduler.c: (remove_from_chain),
(chain_group_set_enabled), (create_group), (add_to_group),
(merge_groups), (setup_group_scheduler), (group_elements),
(gst_opt_scheduler_iterate), (gst_opt_scheduler_show):
Don't try to follow the pad connections with other groups
when a loop based element is added to the scheduler because
the bin will inform the scheduler about the pad links a little
later.