fix bug: msg.c_str

lyblsgo

2023-04-11 dc8a0445d5460af16e9926a492a85da592f224bb

 funasr/runtime/onnxruntime/tester/tester_rtf.cpp

@@ -80,7 +80,7 @@

        if(Result){
            string msg = FunASRGetResult(Result, 0);
            printf("Result: %s \n", msg);
            printf("Result: %s \n", msg.c_str());

            snippet_time = FunASRGetRetSnippetTime(Result);
            total_length += snippet_time;