Fix if path is blank

Author: avara1986

pyms/flask/app/swagger.py

@@ -13,7 +13,7 @@ def __init__(self):
     @property
     def path(self):
         path = self.config.path
-        return path if path else SWAGGER_PATH
+        return path if path is not None else SWAGGER_PATH
 
     @property
     def file(self):