[Bug 722767] gstelement: add function to sync element state with target state of the parent

[GStreamer (bugzilla.gnome.org)]

https://bugzilla.gnome.org/show_bug.cgi?id=722767
  GStreamer | gstreamer (core) | 1.x

--- Comment #2 from Miguel París Díaz <mparisdiaz at gmail.com> 2014-01-28 13:15:38 UTC ---
Created an attachment (id=267402)
 View: https://bugzilla.gnome.org/attachment.cgi?id=267402
 Review: https://bugzilla.gnome.org/review?bug=722767&attachment=267402

gstelement: add function to synchronize with parent target state

OK, I attach the patch in this comment.
Also, I think that we can do a common code for this function and for the
already existing gst_element_sync_state_with_parent function.

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