Bugfix: Check if pad has prefix video_src
Bugfix: Check if pad has prefix video_src

We were checking if prefix was audio_src twice instead of checking
for video

Change-Id: Ifa34ff8e66e92455e9d585c6128395a8817e023a

Kurento/kms-core,TribeMedia/kms-core,shelsonjava/kms-core,shelsonjava/kms-core,KurentoLegacy/gst-kurento-plugins,TribeMedia/kms-core,ESTOS/kms-core,ESTOS/kms-core,ESTOS/kms-core,shelsonjava/kms-core,KurentoLegacy/gst-kurento-plugins,KurentoLegacy/gst-kurento-plugins,TribeMedia/kms-core,Kurento/kms-core,Kurento/kms-core,ESTOS/kms-core,KurentoLegacy/gst-kurento-plugins,TribeMedia/kms-core,shelsonjava/kms-core,Kurento/kms-core