修复分配的内存不够添加\0的问题

include/serial.h

@@ -98,7 +98,7 @@ public:
         std::this_thread::sleep_for(10ms);
         // char buffer[ser.available()] = {0};
         auto availableSize = ser.available();
-        auto buffer = new char[availableSize];
+        char* buffer = new char[availableSize+1];
         std::memset(buffer, 0, availableSize);
         auto size = ser.readBytes(buffer, availableSize, timeout);
         if(size > 0){
@@ -128,7 +128,7 @@ public:
         while(std::chrono::system_clock::now() < endTime){
             std::this_thread::sleep_for(10ms);
             auto availableSize = ser.available();
-            auto buffer = new char[availableSize];
+            auto buffer = new char[availableSize+1];
             auto size = ser.readBytes(buffer, availableSize, timeout);
             auto str = std::string(buffer);
             delete[] buffer;