Fix product_id should be a string not a enum item ! :)

git-svn-id: https://redmine.imt-atlantique.fr/svn/xaal/code/Python/branches/0.7@3029 b32b6428-25c9-4566-ad07-03861ab6144f

devices/protocols/Yeelight/xaal/yeelight/devices.py

@@ -103,7 +103,7 @@ class YeelightDev(object):
         self.on_properties(properties)
         # we need to be connected to find out which model
         if self.dev.product_id == None:
-            self.dev.product_id = self.bulb.bulb_type
+            self.dev.product_id = str(self.bulb.bulb_type)
 
 
 class RGBW(YeelightDev):