plugins/multiqueue: Use cached value instead of expensive object get.
plugins/multiqueue: Use cached value instead of expensive object get.

The task will always exist as long as its owner (i.e. the pad) and that
owner's owner (i.e. multiqueue) exist.

Reduces the number of instruction fetches by 36%.

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