Catch a rare case where GStreamer didn't set videocaps for a video file properly. Everything should still work but we can't lookup whether a pixel aspect ratio exists. Fixes lp bug 441069.
Catch a rare case where GStreamer didn't set videocaps for a video file properly. Everything should still work but we can't lookup whether a pixel aspect ratio exists. Fixes lp bug 441069.

danielgtaylor/arista,danielgtaylor/arista