Fix update_helper-function for log_date

Author: bouwew

plugwise/helper.py

@@ -131,7 +131,8 @@ def update_helper(data, devs, d_dict, d_id, e_type, key):
             if key != item[ATTR_ID]:
                 continue
             devs[d_id][e_type][idx][ATTR_STATE] = data[key]
-
+            if type(data[key]) is list:
+                devs[d_id][e_type][idx][ATTR_STATE] = data[key][0]
 
 def check_model(name, v_name):
     """Model checking before using version_to_model."""