query: fix copy function
query: fix copy function

Copy the structure too.

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