Disable heaters/steppers before message

Marlin/src/Marlin.cpp

@@ -610,12 +610,13 @@ void idle(
  * After this the machine will need to be reset.
  */
 void kill(PGM_P const lcd_msg/*=NULL*/) {
-  SERIAL_ERROR_START();
-  SERIAL_ERRORLNPGM(MSG_ERR_KILLED);
 
   thermalManager.disable_all_heaters();
   disable_all_steppers();
 
+  SERIAL_ERROR_START();
+  SERIAL_ERRORLNPGM(MSG_ERR_KILLED);
+
   #if ENABLED(EXTENSIBLE_UI)
     UI::onPrinterKilled(lcd_msg ? lcd_msg : PSTR(MSG_KILLED));
   #elif ENABLED(ULTRA_LCD)