Revert "dri2: Don't make reference to noClientException"
It's true that the value would always be -1, if it's not zero, but it's usually zero is the problem. As a result we return failure from otherwise successful indirect GLX paths, which isn't very nice of us. This reverts commit 7d33ab0f. Fixes: xorg/xserver#211
revert-noclientexception-thinko in 5 minutes and 23 seconds3 jobs for