plugins/elements/gstqueue.*: In queue, when EOS is received, if minimum threshold...

plugins/elements/gstqueue.*: In queue, when EOS is received, if minimum threshold > max_size - current_level, there i...

Original commit message from CVS:
Patch by Tommi Myöhänen <ext-tommi dot myohanen at nokia dot com>
* plugins/elements/gstqueue.c: (gst_queue_init),
(gst_queue_locked_flush), (gst_queue_handle_sink_event),
(gst_queue_set_property):
* plugins/elements/gstqueue.h:
In queue, when EOS is received, if minimum threshold > max_size -
current_level, there is chance that queue blocks forever in conditional item
del wait. This is because the queue is not emptied completely due to minimum
threshold.
Here is another approach. Instead of setting cur_levels to max in EOS, just
zero all minimum threshold levels. This should make sure that queue gives out
all data. When going to READY (stop) state, just reset the original minimum
threshold levels.
Fixes #336336.