added debug message to debug cleanup problem

pin/__init__.py

@@ -55,6 +55,7 @@ class GPIOWrapper(object):
 
     def cleanup(self,*args):
         lgpio.debug("cleanup! ({})".format(args))
+        lgpio.debug("_pins_for_cleanup is:"+str(_pins_for_cleanup))
         if self.gpio:
             self.gpio.cleanup(_pins_for_cleanup)