[Bug 732976] tests & examples: Unref parent after use

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=732976
  GStreamer | gst-plugins-good | git

--- Comment #2 from Sebastian Rasmussen <sebras at hotmail.com> 2014-07-10 01:11:11 UTC ---
Created an attachment (id=280311)
 View: https://bugzilla.gnome.org/attachment.cgi?id=280311
 Review: https://bugzilla.gnome.org/review?bug=732976&attachment=280311

Patch fixing leak in videocrop test.

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