Eliminate GCC signed/unsigned warnings related to encodings: The
encoding in the RFB protocol has always been signed, and signed values
are also used in the specification (ie DesktopName = -307 etc). In the
code, however, unsigned types were used in a number of places, but not
all, which causes warnings. This patch fixes the problem by switching
to signed values everywhere.



git-svn-id: svn://svn.code.sf.net/p/tigervnc/code/trunk@3968 3789f03b-4d11-0410-bbf8-ca57d06f2519
diff --git a/common/rfb/Decoder.h b/common/rfb/Decoder.h
index 3fdba53..50aee82 100644
--- a/common/rfb/Decoder.h
+++ b/common/rfb/Decoder.h
@@ -32,9 +32,9 @@
     virtual ~Decoder();
     virtual void readRect(const Rect& r, CMsgHandler* handler)=0;
 
-    static bool supported(unsigned int encoding);
-    static Decoder* createDecoder(unsigned int encoding, CMsgReader* reader);
-    static void registerDecoder(unsigned int encoding,
+    static bool supported(int encoding);
+    static Decoder* createDecoder(int encoding, CMsgReader* reader);
+    static void registerDecoder(int encoding,
                                 DecoderCreateFnType createFn);
   private:
     static DecoderCreateFnType createFns[encodingMax+1];