radv: images don't always have extents in RGP
Sometimes the width/height show up as 0, but it's inconsistent.
https://gitlab.freedesktop.org/zmike/dumps/-/blob/master/bioshock_infinite.rgp
Sometimes the width/height show up as 0, but it's inconsistent.
https://gitlab.freedesktop.org/zmike/dumps/-/blob/master/bioshock_infinite.rgp