[Bug 671776] matroskademux: only unlock pad when it was locked

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=671776
  GStreamer | gst-plugins-good | unspecified

--- Comment #1 from Vincent Penquerc'h <vincent.penquerch at collabora.co.uk> 2012-03-10 13:47:18 UTC ---
Created an attachment (id=209390)
 View: https://bugzilla.gnome.org/attachment.cgi?id=209390
 Review: https://bugzilla.gnome.org/review?bug=671776&attachment=209390

matroskademux: only unlock pad when it was locked

This fixes the mutex being unlocked too much and ending up allowing
other threads when they should not.

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