glx: Add back in applegl_create_display() so the OpenGL.framework, on MacOS, pointer get setup.

Fixes: 4e8740370a ("glx: rework __glXInitialize")

Tested-by: Yurii Kolesnykov <root@yurikoles.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32656>

src/glx/glxext.c

@@ -1080,6 +1080,13 @@ __glXInitialize(Display * dpy)
    glx_driver |= GLX_DRIVER_SW;
 #endif
 
+#if defined(GLX_USE_APPLEGL) && !defined(GLX_USE_APPLE)
+   if (!applegl_create_display(dpyPriv)) {
+      free(dpyPriv);
+      return NULL;
+   }
+#endif
+
    if (!AllocAndFetchScreenConfigs(dpy, dpyPriv, glx_driver, !env)) {
       Bool fail = True;
 #if defined(GLX_DIRECT_RENDERING) && (!defined(GLX_USE_APPLEGL) || defined(GLX_USE_APPLE))