pad: error when activation mode is wrong
pad: error when activation mode is wrong

Post an error when we try to push on a pad activated in pull mode and pull on a
pad in push mode.

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