wflinfo: use glGetStringi() only when available
Here are two different patches either one fixing a crash with the following:
export LIBGL_ALWAYS_SOFTWARE=1
wflinfo --platform glx --api gl --profile compat --version 3.1
The latter patch is a cool idea, especially since it addresses the problem on most platforms. Namely glx, cgl and in some EGL cases. I'm inclined to merge it as well, barring any objections.
/cc @bcrocker
Ben any preference on the latter patch?