Error condition compile error on error type

Cython/Compiler/PyrexTypes.py

@@ -924,6 +924,9 @@ class ErrorType(PyrexType):
     def same_as_resolved_type(self, other_type):
         return 1
         
+    def error_condition(self, result_code):
+        return "dummy"
+
 
 rank_to_type_name = (
     "char",         # 0