Fix wrong argument for CMsgWriter::clientCutText()

As a result we weren't overloading properly.

common/rfb/CMsgWriter.cxx

@@ -256,7 +256,7 @@ void CMsgWriter::pointerEvent(const Point& pos, int buttonMask)
 }
 
 
-void CMsgWriter::clientCutText(const char* str, rdr::U32 len)
+void CMsgWriter::clientCutText(const char* str, int len)
 {
   startMsg(msgTypeClientCutText);
   os->pad(3);

common/rfb/CMsgWriter.h

@@ -57,7 +57,7 @@ namespace rfb {
 
     virtual void keyEvent(rdr::U32 keysym, rdr::U32 keycode, bool down);
     virtual void pointerEvent(const Point& pos, int buttonMask);
-    virtual void clientCutText(const char* str, rdr::U32 len);
+    virtual void clientCutText(const char* str, int len);
 
   protected:
     void startMsg(int type);