element: make post_message and query more alike
element: make post_message and query more alike

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