glx/dri2: Fix build with dri2proto which doesn't define X_DRI2SwapInterval.

diff --git a/src/glx/dri2_glx.c b/src/glx/dri2_glx.c
index 3a53ce91b382a19aff115600c85eddafd2de94e2..fa2b98785376c4c2f43143dcdf25a24f8d05568c 100644 (file)
--- a/src/glx/dri2_glx.c
+++ b/src/glx/dri2_glx.c
@@ -204,12 +204,14 @@ dri2CreateDrawable(__GLXscreenConfigs * psc,
       return NULL;
    }
 
+#ifdef X_DRI2SwapInterval
    /*
     * Make sure server has the same swap interval we do for the new
     * drawable.
     */
    if (pdp->swapAvailable)
       DRI2SwapInterval(psc->dpy, xDrawable, pdraw->swap_interval);
+#endif
 
    return &pdraw->base;
 }