[Bugfix] Use rdr::U32 type for length of strings handled by *CutText functions.

This avoids big buffer overflow when memcpy is called with "-1" argument.


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3607 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/rfb/CMsgHandler.h b/common/rfb/CMsgHandler.h
index 6c86df0..188963a 100644
--- a/common/rfb/CMsgHandler.h
+++ b/common/rfb/CMsgHandler.h
@@ -57,7 +57,7 @@
     virtual void setColourMapEntries(int firstColour, int nColours,
 				     rdr::U16* rgbs);
     virtual void bell();
-    virtual void serverCutText(const char* str, int len);
+    virtual void serverCutText(const char* str, rdr::U32 len);
 
     virtual void fillRect(const Rect& r, Pixel pix);
     virtual void imageRect(const Rect& r, void* pixels);