add buffer for nullptr res

雾聪

2024-01-15 37f078ef5f9f6b2d01a8fa0b15c460190b906c87

 runtime/onnxruntime/src/audio.cpp

@@ -945,6 +945,7 @@
{
    if (speech_char != nullptr) {
        free(speech_char);
        speech_char = nullptr;
    }

    FILE* fp;