plugins: reject pixel-aspect-ratio with value 0/1
plugins: reject pixel-aspect-ratio with value 0/1

Do not negotiate a pixel-aspect-ratio of 0/1.

https://bugzilla.gnome.org/show_bug.cgi?id=781759

GStreamer/gstreamer-vaapi,GStreamer/gstreamer-vaapi,ceyusa/gstreamer-vaapi,ceyusa/gstreamer-vaapi