UINTPTR_MAX, INTPTR_MAX requirements

[Dave Love]

On OSF 5.1, at least, source from CVS of yesterday won't build:

gcc -DHAVE_CONFIG_H -I.. -I./.. -g -O2 -Wall -Wmissing-prototypes -c gh_data.c  
-DPIC -o .libs/gh_data.lo
gh_data.c: In function `gh_ints2scm':
gh_data.c:128: `INTPTR_MAX' undeclared (first use in this function)
gh_data.c:128: (Each undeclared identifier is reported only once
gh_data.c:128: for each function it appears in.)
gmake[1]: *** [gh_data.lo] Error 1
gmake[1]: Leaving directory `/cluster/members/member0/tmp/guile-1.7.0/libguile'
gmake: *** [all-recursive] Error 1

because:

$ find /usr/include -name \*.h|xargs grep INTPTR_MAX
$ 

I don't know which headers one should include for UINTPTR_MAX,
INTPTR_MAX on random systems, so I haven't tried the autoconfiscation.