Fix for the PR #5088 (Handle M108 in M1 also with ULTIPANEL)

Marlin/Marlin.h

@@ -270,7 +270,7 @@ extern bool axis_known_position[XYZ]; // axis[n].is_known
 extern bool axis_homed[XYZ]; // axis[n].is_homed
 extern volatile bool wait_for_heatup;
 
-#if ENABLED(EMERGENCY_PARSER) && DISABLED(ULTIPANEL)
+#if ENABLED(ULTIPANEL) || ENABLED(EMERGENCY_PARSER)
   extern volatile bool wait_for_user;
 #endif