[Aldor-l] Bigint bug(!)

[pip88nl at gmail.com]

Hi,

bigint has a definite bug on twos complement systems. In xintStoreI,
which takes a signed long, the following code fails for LONG_MIN:

  u = (n < 0) ? -n : n;

LONG_MIN is -2147483648 on 32 bit platforms and on twos complement
systems, applying unary - to that will set the OF bit of the CFLAGS
register to 1 (it causes a signed overflow). How should we fix this? It
is a no-go to cause an assertion error on this.

Pippijn
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