Use display polling by default in WinVNC

Window hooks aren't working well on modern systems so switch the
default to polling until we can fix things.

win/rfb_win32/SDisplay.cxx

@@ -45,7 +45,7 @@ static LogWriter vlog("SDisplay");
 // - SDisplay-specific configuration options
 
 IntParameter rfb::win32::SDisplay::updateMethod("UpdateMethod",
-  "How to discover desktop updates; 0 - Polling, 1 - Application hooking, 2 - Driver hooking.", 1);
+  "How to discover desktop updates; 0 - Polling, 1 - Application hooking, 2 - Driver hooking.", 0);
 BoolParameter rfb::win32::SDisplay::disableLocalInputs("DisableLocalInputs",
   "Disable local keyboard and pointer input while the server is in use", false);
 StringParameter rfb::win32::SDisplay::disconnectAction("DisconnectAction",