[rfc] Delete macro MALLOC_INCOMPATIBLE

[Andrew Cagney]

Hello,

The attatched patch deletes the macro ``MALLOC_INCOMPATIBLE''.  The host
systems:

	SunOS-4
	hpux x.y
	Windows

were defining it. I'm pretty sure it is ok for HP/UX since that system
always defined malloc, free and realloc to ISO-C standards.  I'm not so
sure about SunOS or Windows.

Is anyone else able to comment on those systems?  If SunOS turns out to
have ``char *malloc()'' then that should be handled by configure.in and
xm-*.h.

	Andrew

PS: If the entire patch goes through then this will also update the
docs.