joerg 09f1f2a58b Fix a gross bug in the ! operator optimization code. The following
kind of expressions caused a dereferencation of an uninitialized malloc
area, yielding wrong expression evaluation at best, and core dumps at
worst (malloc.conf -> AJ):

	find ... ! \( expr1 ! expr2 \) ...
1997-03-10 19:20:39 +00:00
..
1997-02-22 19:58:13 +00:00
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1996-08-12 11:39:24 +00:00
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1995-05-30 06:41:30 +00:00