Make new statement on cypclass call default constructor

Cython/Compiler/ExprNodes.py

@@ -5913,6 +5913,8 @@ class SimpleCallNode(CallNode):
         max_nargs = len(func_type.args)
         expected_nargs = max_nargs - func_type.optional_arg_count
         actual_nargs = len(self.args)
+        if self.type.is_cyp_class and isinstance(self.function, NewExprNode):
+            return "%s()" % self.function.result()
         for formal_arg, actual_arg in args[:expected_nargs]:
                 arg_code = actual_arg.result_as(formal_arg.type)
                 arg_list_code.append(arg_code)