gst/mpegtsmux/mpegtsmux.c: Fix EOS logic by correctly popping the collect pad buffers...

gst/mpegtsmux/mpegtsmux.c: Fix EOS logic by correctly popping the collect pad buffers only when we've chosen to use t...

Original commit message from CVS:
Patch by: vanista <vanista at gmail dot com>
* gst/mpegtsmux/mpegtsmux.c: (mpegtsmux_choose_best_stream):
Fix EOS logic by correctly popping the collect pad buffers only
when we've chosen to use them instead of popping them always and
storing them in a private queue.
Before the pipeline would deadlock if all pads go EOS at the same
time. Fixes bug #557763.