Use the config flag instead of always True

theano/gof/cc.py

@@ -283,10 +283,10 @@ def get_nothing(r, name, sub):
 def get_c_declare(r, name, sub):
     """Wrapper around c_declare that declares py_name"""
     if ((any([getattr(c.op, 'check_input', config.check_input)
-             for (c, _) in r.clients
-             if not isinstance(c, string_types)]) or
-         (r.owner and getattr(r.owner.op, 'check_input', True)))):
-
+              for (c, _) in r.clients
+              if not isinstance(c, string_types)]) or
+         (r.owner and
+          getattr(r.owner.op, 'check_input', config.check_input)))):
         c_declare = r.type.c_declare(name, sub, True)
     else:
         c_declare = r.type.c_declare(name, sub, False)