[Bug 724131] colorbalance: add colorbalance meta API

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=724131
  GStreamer | gst-plugins-base | git

--- Comment #19 from Sebastian Dröge (slomo) <slomo at coaxion.net> 2014-05-26 13:04:24 UTC ---
So what should we do about this?

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