[Bug 678482] graphicsvideosurface.h: Fix example code

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=678482
  GStreamer | qt-gstreamer | git

Tim-Philipp Müller <t.i.m> changed:

           What    |Removed                     |Added
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                 CC|                            |kiagiadakis.george at gmail.co
                   |                            |m, t.i.m at zen.co.uk

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