Add compatibility with regular (non structured) logging usage

EvaSDK · EvaSDK · commit f54dda2db766 · 2014-08-01T13:39:27.000+02:00
Part of fluent#8.
diff --git a/fluent/handler.py b/fluent/handler.py
@@ -51,7 +51,7 @@ def _structuring(self, data, msg):
             try:
                 self._add_dic(data, json.loads(str(msg)))
             except (ValueError, json.JSONDecodeError):
-                pass
+                self._add_dic(data, {'message': msg})
 
     @staticmethod
     def _add_dic(data, dic):
