xwm: Don't try to read deleted properties
diff --git a/src/xwayland/window-manager.c b/src/xwayland/window-manager.c
index de17c4e..ddb3019 100644
--- a/src/xwayland/window-manager.c
+++ b/src/xwayland/window-manager.c
@@ -646,8 +646,11 @@
 
 	fprintf(stderr, "XCB_PROPERTY_NOTIFY: window %d, ",
 		property_notify->window);
-	read_and_dump_property(wm, property_notify->window,
-			       property_notify->atom);
+	if (property_notify->state == XCB_PROPERTY_DELETE)
+		fprintf(stderr, "deleted\n");
+	else
+		read_and_dump_property(wm, property_notify->window,
+				       property_notify->atom);
 
 	if (property_notify->atom == wm->atom.net_wm_name ||
 	    property_notify->atom == XCB_ATOM_WM_NAME)