[Bug 734623] facedetect: fix NULL error when disable eyes/nose/mouth

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=734623
  GStreamer | gst-plugins-bad | git

--- Comment #4 from valx76 at gmail.com 2014-08-11 19:32:28 UTC ---
Created an attachment (id=283132)
 View: https://bugzilla.gnome.org/attachment.cgi?id=283132
 Review: https://bugzilla.gnome.org/review?bug=734623&attachment=283132

follows thiagoss advices

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