[Bug 774747] New: gst-plugins-good compile error with gcc 6.2

[GStreamer (GNOME Bugzilla)]

https://bugzilla.gnome.org/show_bug.cgi?id=774747

            Bug ID: 774747
           Summary: gst-plugins-good compile error with gcc 6.2
    Classification: Platform
           Product: GStreamer
           Version: git master
                OS: Linux
            Status: NEW
          Severity: normal
          Priority: Normal
         Component: gst-plugins-good
          Assignee: gstreamer-bugs at lists.freedesktop.org
          Reporter: christophevr at telenet.be
        QA Contact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---

Created attachment 340353
  --> https://bugzilla.gnome.org/attachment.cgi?id=340353&action=edit
Just initialize size with 0.

With git master there is a compile error with gcc 6.2
Build in cross bitbake enviroment for mipsel32el stb's
Pli5

Host pc ubuntu 16.04 x86_64 target mipsel32el vuduo2 stb.
Compiler gcc/g++ 6.2.

ERROR:

| ../../../git/gst/isomp4/qtdemux.c: In function 'qtdemux_parse_tree':
| ../../../git/gst/isomp4/qtdemux.c:10224:24: error: 'size' may be used
uninitialized in this function [-Werror=maybe-uninitialized]
|                  offset += size;
|                         ^~
| ../../../git/gst/isomp4/qtdemux.c:10197:25: note: 'size' was declared here
|                  guint32 size, tag;
|                          ^~~~

It can be easely solved with patch I included here.

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