Move socket write event handling in to the RFB core

What to do when a socket is writeable should be handled in the
RFB core code as there may be other events we want to fire off
when this happens.
diff --git a/win/rfb_win32/SocketManager.cxx b/win/rfb_win32/SocketManager.cxx
index b073b8f..5b211a0 100644
--- a/win/rfb_win32/SocketManager.cxx
+++ b/win/rfb_win32/SocketManager.cxx
@@ -193,7 +193,7 @@
       WSAResetEvent(event);
 
       // Call the socket server to process the event
-      ci.server->processSocketEvent(ci.sock);
+      ci.server->processSocketReadEvent(ci.sock);
       if (ci.sock->isShutdown()) {
         remSocket(ci.sock);
         return;