Bug#788708: iceweasel: GStreamer causes segmentation fault

[Tim-Philipp Müller]

This looks at first glance like some GStreamer element(s) could not be
created, such as appsink, maybe others too; possibly because the
required GStreamer plugins are not installed. Combined with insufficient
error handling.

I note that this bug was reported against an iceweasel version that uses
the old and unmaintained GStreamer 0.10.x.

The current iceweasel version uses GStreamer 1.x, and I can't reproduce
this problem with 38.2.0esr-1 either.