tweak style

Marlin/src/module/temperature.cpp

@@ -4419,11 +4419,10 @@ void Temperature::isr() {
   #if ENABLED(AUTO_REPORT_TEMPERATURES)
     AutoReporter<Temperature::AutoReportTemp> Temperature::auto_reporter;
     void Temperature::AutoReportTemp::report() {
-      if(!wait_for_heatup) {
+      if (wait_for_heatup) return;
       print_heater_states(active_extruder OPTARG(HAS_TEMP_REDUNDANT, ENABLED(AUTO_REPORT_REDUNDANT)));
       SERIAL_EOL();
     }
-    }
   #endif
 
   #if HAS_HOTEND && HAS_STATUS_MESSAGE