Merge pull request #1034 from DerFlob/Marlin_v1

Fix reseting CHDK pin to LOW

Marlin/Marlin_main.cpp

   }
   
   #ifdef CHDK //Check if pin should be set to LOW after M240 set it to HIGH
-    if (chdkActive)
+    if (chdkActive && (millis() - chdkHigh > CHDK_DELAY))
     {
       chdkActive = false;
-      if (millis()-chdkHigh < CHDK_DELAY) return;
       WRITE(CHDK, LOW);
     }
   #endif