bug#2532: NS: ns-expand-space / slider in Preferences dialog not functional

[David Reitter]

Setting `ns-expand-space' doesn't work, and neither does changing its  
value via the slider the the preferences panel.

Also, the doc string of the above variable says that one shouldn't set  
it directly - if so, how is one supposed to (programmatically) set this?
Studying the source code (nsterm.m:setValuesFromPanel), it seems to me  
that setting the value should work just fine (I even tried calling ns- 
save-preferences).

This is with a vanilla 23/NS build from today's CVS.

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