Fixed -encodeWithCoder: in NSView to encode the superview conditionally as Cocoa 
does (Apple discusses  superview encoding as a use case for conditional encoding 
in the Archiving related documentation).

Note: A view can now be archived (or copied) without having to remove the view 
from its hierarchy before archiving it.


git-svn-id: svn+ssh://svn.gna.org/svn/gnustep/libs/gui/trunk@36065 72102866-910b-0410-8b05-ffd578937521