[net.sources.games] advgen fix

grady@ucbingres.ARPA (Steven Grady) (09/29/85)

Advgen is good_stuff, but it doesn't allow for negative numbers
(which would be useful for implementing money, for instance)

Here's a fix:
In advlex.l, replace
NUM     {DIGIT}+
with
NUM     -?{DIGIT}+

(It's near the beginning)
	Steven