Added attributes changes log

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/fork@1632 b32b6428-25c9-4566-ad07-03861ab6144f

lib/xaal/lib/devices.py

@@ -51,6 +51,7 @@ class Attribute(object):
             eng = self.device.engine
             if eng:
                 eng.add_attributesChange(self)
+                logger.debug("Attr change %s=%s" % (self.name,value))
         self.__value = value
 
     def __str__(self):