wayland: Only pass wl_drm instance to gbm when using gbm platform
diff --git a/src/egl/drivers/dri2/egl_dri2.c b/src/egl/drivers/dri2/egl_dri2.c
index 18ecdc8..1089616 100644
--- a/src/egl/drivers/dri2/egl_dri2.c
+++ b/src/egl/drivers/dri2/egl_dri2.c
@@ -1855,7 +1855,8 @@
 
    /* We have to share the wl_drm instance with gbm, so gbm can convert
     * wl_buffers to gbm bos. */
-   dri2_dpy->gbm_dri->wl_drm = dri2_dpy->wl_server_drm;
+   if (dri2_dpy->gbm_dri)
+      dri2_dpy->gbm_dri->wl_drm = dri2_dpy->wl_server_drm;
 
    return EGL_TRUE;
 }