inputselector: Remove useless variables and fix a uninitialized variable compiler warnings
inputselector: Remove useless variables and fix a uninitialized variable compiler warnings

Merged from gst-plugins-base, dfd51aa82a9e1c9924375183796eab70e574a231.

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