Comment 0 for bug 1764877

On Ubuntu 16.04 with xserver-xorg-2:1.17.2-2, xvimagesink fails for certain sizes of image. Originally seen when receiving a meeting screen share in Pidgin, reproducible as follows:

$ gst-launch-1.0 -v videotestsrc ! video/x-raw,width=905,height=720 ! xvimagesink

The problem is actually in glamor_xv.c, fixed by the following upstream patch:
https://cgit.freedesktop.org/xorg/xserver/commit/?id=12a6b189fb17894d2c3851b70a396bbf41f444c6