libs/gst/base/gstbasesrc.c: Make sending an EOS event to the basesrc non-blocking...

libs/gst/base/gstbasesrc.c: Make sending an EOS event to the basesrc non-blocking even if the implementation does blo...

Original commit message from CVS:
Based on patch by: Bjarne Rosengren <bjarne at axis dot com>
* libs/gst/base/gstbasesrc.c: (gst_base_src_send_event),
(gst_base_src_get_range), (gst_base_src_pad_get_range),
(gst_base_src_loop), (gst_base_src_set_flushing),
(gst_base_src_change_state):
Make sending an EOS event to the basesrc non-blocking even if the
implementation does blocking waits in the create function. This is done
by unlocking the create function when EOS is sent.
Fixes #535218.