Fix "Heating..." message

Marlin/Marlin_main.cpp

@@ -5308,7 +5308,7 @@ inline void gcode_M104() {
       }
     #endif
 
-    if (code_value_temp_abs() > thermalManager.degHotend(target_extruder)) status_printf(0, "E%i %s", target_extruder + 1, PSTR(MSG_HEATING));
+    if (code_value_temp_abs() > thermalManager.degHotend(target_extruder)) status_printf(0, PSTR("E%i %s"), target_extruder + 1, MSG_HEATING);
   }
 
   #if ENABLED(AUTOTEMP)
@@ -5506,7 +5506,7 @@ inline void gcode_M109() {
       else print_job_timer.start();
     #endif
 
-    if (thermalManager.isHeatingHotend(target_extruder)) status_printf(0, "E%i %s", target_extruder + 1, PSTR(MSG_HEATING));
+    if (thermalManager.isHeatingHotend(target_extruder)) status_printf(0, PSTR("E%i %s"), target_extruder + 1, MSG_HEATING);
   }
 
   #if ENABLED(AUTOTEMP)