Fixed a few MSVC warnings.

src/Protocol/ProtocolRecognizer.cpp

@@ -198,7 +198,7 @@ void cProtocolRecognizer::SendDisconnect(const AString & a_Reason)
 	else
 	{
 		// This is used when the client sends a server-ping, respond with the default packet:
-		WriteByte  ((char)0xff);  // PACKET_DISCONNECT
+		WriteByte  (0xff);  // PACKET_DISCONNECT
 		WriteString(a_Reason);
 	}
 }