Original commit message from CVS: * ext/libmng/gstmngdec.c: (gst_mngdec_loop), (mngdec_error), (mngdec_openstream), (mngdec_closestream), (mngdec_handle_sink_event), (mngdec_readdata), (mngdec_gettickcount), (mngdec_settimer), (mngdec_processheader), (mngdec_getcanvasline), (mngdec_refresh), (gst_mngdec_change_state): Set the framerate correctly.