[Bug 37534] configure gives incorrect warning when Xrender can't be found due to missing libXext

https://bugs.winehq.org/show_bug.cgi?id=37534

Dmitry Timoshkov  changed:

What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|configure gives incorrect   |configure gives incorrect
                   |warning when Xrender can't  |warning when Xrender can't
                   |be found due due missing    |be found due to missing
                   |libXext                     |libXext