changed static var in activate

lib/treppe/treppe.cpp

   Serial.printf("Treppe: idle_pwm=%d\n", idle_pwm);
   berechne_dimmer();
   activate_idle_pwm(true);
-  activate_idle_pwm(false); // well :)
 }
 
 void Treppe::activate_idle_pwm(bool active)
 {
-  static uint8_t former_active = 0;
+  static uint16_t last_pwm = 0;
 
   if (fsm_outputs.status == ST_RUHEZUSTAND || fsm_outputs.status == ST_INAKTIV_LDR)
   {
-    if (active != former_active)
+    idle_pwm_internal = idle_pwm * active;
+    if (idle_pwm_internal != last_pwm)
     {
-      idle_pwm_internal = idle_pwm * active;
       // Dimming Function for all LEDS ?
+      berechne_dimmer();
       pwmController.setAllChannelsPWM(idle_pwm_internal);
-      former_active = active;
+      last_pwm = idle_pwm_internal;
     }
   }
 }