[Bug 727889] mxf: avoid dereferencing NULL pointer and leak fixes

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=727889
  GStreamer | gst-plugins-bad | git

Edward Hervey <bilboed> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |RESOLVED
                 CC|                            |bilboed at bilboed.com
         Resolution|                            |FIXED
   Target Milestone|HEAD                        |1.3.1

--- Comment #1 from Edward Hervey <bilboed at bilboed.com> 2014-04-16 14:09:14 UTC ---
commit 172c39812726c06b3a922a2a6c2fedc8f333a187
Author: Vincent Penquerc'h <vincent.penquerch at collabora.co.uk>
Date:   Wed Apr 9 12:27:16 2014 +0100

    mxf: avoid dereferencing NULL mapping data pointer

    Also unref buffers on error, as it seems to be done in one, but
    not all, error paths.

    The NULL pointer part is Coverity 206112

    https://bugzilla.gnome.org/show_bug.cgi?id=727889

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