Fixed compile error with ENABLE_SD_CARD undefined

Grbl_Esp32/report.cpp

@@ -206,8 +206,10 @@ void report_feedback_message(uint8_t message_code)  // OK to send to all clients
       grbl_send(CLIENT_ALL, "[MSG:Restoring spindle]\r\n"); break;
     case MESSAGE_SLEEP_MODE:
       grbl_send(CLIENT_ALL, "[MSG:Sleeping]\r\n"); break;
+#ifdef ENABLE_SD_CARD		
 		case MESSAGE_SD_FILE_QUIT:
 			grbl_sendf(CLIENT_ALL, "[MSG:Reset during SD file at line: %d]\r\n", sd_get_current_line_number()); break;
+#endif
   }  		
 }