Gradients are broken with glamor when RepeatReflect is set

[Clemens Eisserer]

Hi there,

Glamor's gradient acceleration code is broken in case RepeatReflect is
used, please see: https://bugs.freedesktop.org/show_bug.cgi?id=98508
I've filed the bug report over a year ago, but except for a
confirmation from Michel Dänzer nothing happend.

Unfourntunatly I lack the expertise to fix it myself - however instead
of leaving it broken forever, could we fall back to software for
RepeatReflect.
I guess slow is better than completly broken?

Best reards, Clemens