Chnages to mono-bitmap code.

Added ConvertToMonoBitmap() to wxImage.
  Minor changes to forty.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@5359 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

demos/forty/playerdg.cpp

@@ -123,6 +123,8 @@ PlayerSelectionDialog::PlayerSelectionDialog(
 	}
 
 	Layout();
+    
+    CentreOnParent();
 }
 
 PlayerSelectionDialog::~PlayerSelectionDialog()