GstPad: use new task function
GstPad: use new task function

Use the new task_set_state function and actually return its result to
the caller.

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