omxvideodec: Check return value of gst_buffer_map()
omxvideodec: Check return value of gst_buffer_map()

CID 1214599

renesas-rcar/gst-omx,varunkumara/test-repo,surround-io/gst-omx,CapOM/gst-omx,ismelykh/gst-omx-deinterlace,surround-io/gst-omx,freedesktop-unofficial-mirror/gstreamer__gst-omx,GStreamer/gst-omx,varunkumara/test-repo,freedesktop-unofficial-mirror/gstreamer__gst-omx,renesas-rcar/gst-omx,varunkumara/test-repo,renesas-rcar/gst-omx,GStreamer/gst-omx,GStreamer/gst-omx,pliu6/gst-omx,leio/gst-omx,ismelykh/gst-omx-deinterlace,CapOM/gst-omx,leio/gst-omx,CapOM/gst-omx,pliu6/gst-omx