registrychunks: Initialize typefind/element factory registry chunks with zeroes
registrychunks: Initialize typefind/element factory registry chunks with zeroes

This makes valgrind stop complaining about reading unitializated memory,
which is not initialized because it's just compiler-added struct padding...

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