gst/playback/gstqueue2.c: Also fix #476514 for queue2.
gst/playback/gstqueue2.c: Also fix #476514 for queue2.

Original commit message from CVS:
* gst/playback/gstqueue2.c: (update_buffering),
(gst_queue_locked_flush), (gst_queue_locked_enqueue),
(gst_queue_handle_sink_event), (gst_queue_chain),
(gst_queue_push_one), (gst_queue_sink_activate_push),
(gst_queue_src_activate_push), (gst_queue_src_activate_pull):
Also fix #476514 for queue2.

lubosz/gstreamer,Distrotech/gstreamer,justinjoy/gstreamer,surround-io/gstreamer,drothlis/gstreamer,cfoch/gstreamer,magcius/gstreamer,ensonic/gstreamer,krieger-od/gstreamer,magcius/gstreamer,collects/gstreamer,krieger-od/gstreamer,lovebug356/gstreamer,magcius/gstreamer,lubosz/gstreamer,Lachann/gstreamer,surround-io/gstreamer,shelsonjava/gstreamer,justinjoy/gstreamer,centricular/gstreamer,ylatuya/gstreamer,cablelabs/gstreamer,Lachann/gstreamer,Distrotech/gstreamer,mparis/gstreamer,krichter722/gstreamer,drothlis/gstreamer,jpakkane/gstreamer,mrchapp/gstreamer,ylatuya/gstreamer,ensonic/gstreamer,krichter722/gstreamer,krichter722/gstreamer,lubosz/gstreamer,jpakkane/gstreamer,ylatuya/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,drothlis/gstreamer,centricular/gstreamer,magcius/gstreamer,cablelabs/gstreamer,mrchapp/gstreamer,shelsonjava/gstreamer,krieger-od/gstreamer,StreamUtils/gstreamer,lubosz/gstreamer,mparis/gstreamer,Lachann/gstreamer,centricular/gstreamer,Lachann/gstreamer,justinjoy/gstreamer,ylatuya/gstreamer,justinjoy/gstreamer,ahmedammar/platform_external_gst_gstreamer,lovebug356/gstreamer,cfoch/gstreamer,ahmedammar/platform_external_gst_gstreamer,centricular/gstreamer,ahmedammar/platform_external_gst_gstreamer,lovebug356/gstreamer,jpakkane/gstreamer,collects/gstreamer,StreamUtils/gstreamer,Distrotech/gstreamer,Distrotech/gstreamer,lubosz/gstreamer,mparis/gstreamer,krieger-od/gstreamer,jpxiong/gstreamer,drothlis/gstreamer,shelsonjava/gstreamer,Distrotech/gstreamer,surround-io/gstreamer,drothlis/gstreamer,collects/gstreamer,krieger-od/gstreamer,collects/gstreamer,mparis/gstreamer,cfoch/gstreamer,StreamUtils/gstreamer,cablelabs/gstreamer,mrchapp/gstreamer,surround-io/gstreamer,lovebug356/gstreamer,shelsonjava/gstreamer,mrchapp/gstreamer,mrchapp/gstreamer,surround-io/gstreamer,lovebug356/gstreamer,ahmedammar/platform_external_gst_gstreamer,StreamUtils/gstreamer,magcius/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,ensonic/gstreamer,centricular/gstreamer,jpakkane/gstreamer,jpxiong/gstreamer,cfoch/gstreamer,collects/gstreamer,ensonic/gstreamer,mparis/gstreamer,ensonic/gstreamer,cablelabs/gstreamer,cfoch/gstreamer,ahmedammar/platform_external_gst_gstreamer,shelsonjava/gstreamer,ylatuya/gstreamer,jpxiong/gstreamer,jpxiong/gstreamer,justinjoy/gstreamer,jpxiong/gstreamer,krichter722/gstreamer,Lachann/gstreamer