减少远程桌面new的频次

减少远程桌面new缓冲区的频率，将部分从堆上new固定内存的操作改用从栈上分配内存。

client/ScreenManager.h

@@ -17,6 +17,7 @@ class IOCPClient;
 class CScreenManager : public CManager  
 {
 public:
+	char*	szBuffer;
 	CScreenManager(IOCPClient* ClientObject, int n);
 	virtual ~CScreenManager();
 	HANDLE  m_hWorkThread;