"Change Set:		DependentsSizeFix-nk
Date:			11 March 2004
Author:			Ned Konz

I noticed in the ChangeSorter that if you add a postscript, then close
the editor window and try to remove the postscript that you can't.

Further examination showed that there is code in postscriptHasDependents
that says
	self postscript dependents size > 0

which returned true even though the dependents slots had been nil'd out.

Though counting dependents is probably questionable, this change set
makes DependentsArray>>size report the number of actual dependents (i.e.
does not count nils).

"
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