Eliminate another GCC signed/unsigned warning: 
* setExtendedDesktopSize reason is signed, but result codes are not. 


git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3967 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/rfb/CMsgHandler.cxx b/common/rfb/CMsgHandler.cxx
index 65e96f3..de99abd 100644
--- a/common/rfb/CMsgHandler.cxx
+++ b/common/rfb/CMsgHandler.cxx
@@ -44,7 +44,7 @@
 {
   cp.supportsSetDesktopSize = true;
 
-  if ((reason == reasonClient) && (result != resultSuccess))
+  if ((reason == (signed)reasonClient) && (result != (signed)resultSuccess))
     return;
 
   if (!layout.validate(width, height))