Some small cleanups implement a default _clock_wait
Some small cleanups implement a default _clock_wait

Original commit message from CVS:
Some small cleanups
implement a default _clock_wait

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