fix: msg_stamp.size() is unsigned,should convert to int (#2523)

TouchZZZ

2025-05-22 eccf74684743593950ad259877db7ce9ffc06e93

 runtime/onnxruntime/src/funasrruntime.cpp

@@ -297,7 +297,7 @@
         //timestamp
         if(msg_vec.size() > 1){
            std::vector<std::string> msg_stamp = funasr::split(msg_vec[1], ',');
            for(int i=0; i<msg_stamp.size()-1; i+=2){
            for(int i=0; i<(int)msg_stamp.size()-1; i+=2){
               float begin = std::stof(msg_stamp[i])+msg_stimes[idx];
               float end = std::stof(msg_stamp[i+1])+msg_stimes[idx];
               cur_stamp += "["+std::to_string((int)(1000*begin))+","+std::to_string((int)(1000*end))+"],";