fix: compile

hw/xfree86/drivers/modesetting/drmmode_display.c

@@ -1443,6 +1443,7 @@ drmmode_update_scanout_buffer(xf86CrtcPtr crtc, drmmode_shadow_scanout_ptr scano
 
     /* force the buffer to be rendered to as quickly as possible */
     #ifdef GLAMOR_HAS_GBM
+    modesettingPtr ms = modesettingPTR(crtc->scrn);
     glamor_finish(pScreen);
     #endif
 }