[Xsb-development] Aborts into misc_errors

[Terrance S. <ts...@cs...>]

All:

I just made a change to the error code so that abort/1, abort/0
and xsb_basic_abort() all throw error terms of the same shape as
our ISO-style errors (instantiation,type,domain etc.), and of
type misc_error.

This may seem like a small detail, but we've had at least one
user ask for better ISO error compatability.  If you introduce
new error conditions in system code, please use the predicates
instantiation_error/3, type_error/4, etc in error_handler.P these
are applicable.  Some analogous C-functions are in error_xsb.c.

I also updated most of the aborts in standard.P to their proper
ISO-types.  There are plenty more left around the system, if
anyone's bored :-)

Terry