Do not do any GLX calls on a display that does not support GLX.
[wine] / dlls / x11drv /
drwxr-xr-x   ..
-rw-r--r-- 49 .cvsignore
-rw-r--r-- 827 Makefile.in
-rw-r--r-- 1791 x11drv.spec
-rw-r--r-- 12507 x11drv_main.c