collectpads: fix g-i annotation for GstCollectPadsBufferFunction
collectpads: fix g-i annotation for GstCollectPadsBufferFunction

We pass ownership of the buffer to the function.

centricular/gstreamer,justinjoy/gstreamer,jpakkane/gstreamer,shelsonjava/gstreamer,justinjoy/gstreamer,cablelabs/gstreamer,krichter722/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,jpakkane/gstreamer,surround-io/gstreamer,justinjoy/gstreamer,mparis/gstreamer,StreamUtils/gstreamer,ensonic/gstreamer,cfoch/gstreamer,lubosz/gstreamer,lovebug356/gstreamer,lovebug356/gstreamer,collects/gstreamer,lubosz/gstreamer,jpxiong/gstreamer,justinjoy/gstreamer,shelsonjava/gstreamer,cablelabs/gstreamer,jpxiong/gstreamer,cablelabs/gstreamer,Lachann/gstreamer,lubosz/gstreamer,centricular/gstreamer,mparis/gstreamer,cfoch/gstreamer,StreamUtils/gstreamer,krichter722/gstreamer,ensonic/gstreamer,ensonic/gstreamer,ensonic/gstreamer,centricular/gstreamer,cfoch/gstreamer,surround-io/gstreamer,collects/gstreamer,krichter722/gstreamer,cablelabs/gstreamer,krieger-od/gstreamer,lovebug356/gstreamer,lovebug356/gstreamer,Lachann/gstreamer,Lachann/gstreamer,jpxiong/gstreamer,StreamUtils/gstreamer,justinjoy/gstreamer,centricular/gstreamer,mparis/gstreamer,lubosz/gstreamer,mparis/gstreamer,ensonic/gstreamer,krieger-od/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,jpxiong/gstreamer,shelsonjava/gstreamer,shelsonjava/gstreamer,jpakkane/gstreamer,centricular/gstreamer,surround-io/gstreamer,lubosz/gstreamer,cfoch/gstreamer,krieger-od/gstreamer,cablelabs/gstreamer,jpakkane/gstreamer,jpakkane/gstreamer,krieger-od/gstreamer,cfoch/gstreamer,surround-io/gstreamer,lovebug356/gstreamer,collects/gstreamer,StreamUtils/gstreamer,collects/gstreamer,mparis/gstreamer,Lachann/gstreamer,surround-io/gstreamer,Lachann/gstreamer,krieger-od/gstreamer,krichter722/gstreamer,collects/gstreamer