!1710 Fix arg index check error when return Parameter defined in Net directly

Merge pull request !1710 from fary86/fix_arg_index_check_error_when_return_param

mindspore/ccsrc/utils/convert_utils.cc

@@ -422,8 +422,9 @@ bool IsGraphOutputValueNodeOrParameter(const AnfNodePtr &output, const py::tuple
       MS_EXCEPTION(UnknownError) << "When graph output is Parameter,  it should be found in graph parameters";
     }
     size_t index = it - params.cbegin();
-    if (index >= args.size()) {
-      MS_EXCEPTION(UnknownError) << "Index " << index << " equal or larger than args size " << args.size() << ".";
+    if (index >= args.size() + func_graph->hyper_param_count()) {
+      MS_EXCEPTION(UnknownError) << "Index " << index << " equal or larger than args size " << args.size()
+                                 << " add Parameter count " << func_graph->hyper_param_count() << ".";
     }
     *ret_val = args[index];
     return true;