Handle CopyRect like any other encoding

Avoids having to special case things. Keeps the code simpler.
diff --git a/common/rfb/CopyRectDecoder.cxx b/common/rfb/CopyRectDecoder.cxx
new file mode 100644
index 0000000..4c83583
--- /dev/null
+++ b/common/rfb/CopyRectDecoder.cxx
@@ -0,0 +1,39 @@
+/* Copyright 2014 Pierre Ossman <ossman@cendio.se> for Cendio AB
+ * 
+ * This is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ * 
+ * This software is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ * 
+ * You should have received a copy of the GNU General Public License
+ * along with this software; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307,
+ * USA.
+ */
+#include <rdr/InStream.h>
+#include <rfb/CMsgReader.h>
+#include <rfb/CMsgHandler.h>
+#include <rfb/PixelBuffer.h>
+#include <rfb/CopyRectDecoder.h>
+
+using namespace rfb;
+
+CopyRectDecoder::CopyRectDecoder(CMsgReader* reader) : Decoder(reader)
+{
+}
+
+CopyRectDecoder::~CopyRectDecoder()
+{
+}
+
+void CopyRectDecoder::readRect(const Rect& r, CMsgHandler* handler)
+{
+  int srcX = reader->getInStream()->readU16();
+  int srcY = reader->getInStream()->readU16();
+  handler->copyRect(r, srcX, srcY);
+}