[Bug 731147] New: waylandsink: Initialize a wl_callback pointer value after it is destroyed

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=731147
  GStreamer | gst-plugins-bad | git

           Summary: waylandsink: Initialize a wl_callback pointer value
                    after it is destroyed
    Classification: Platform
           Product: GStreamer
           Version: git
        OS/Version: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: Normal
         Component: gst-plugins-bad
        AssignedTo: gstreamer-bugs at lists.freedesktop.org
        ReportedBy: kkobayas at igel.co.jp
         QAContact: gstreamer-bugs at lists.freedesktop.org
     GNOME version: ---


Created an attachment (id=277785)
 View: https://bugzilla.gnome.org/attachment.cgi?id=277785
 Review: https://bugzilla.gnome.org/review?bug=731147&attachment=277785

waylandsink: Initialize a wl_callback pointer value after it is destroyed

wl_callback_destroy() could cause a segmentation fault when waylandsink is
finalized because a wl_callback pointer which has already been destroyed in
frame_redraw_callback() could be passed into the method.
This patch fixes that.

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