minor problem with util-int.c v1.19

[Phil Tracy <ptracy@northwestern.edu>]

I'm compiling the latest (as of 3/8/00 9:00 AM) collection of stuff from 
CVS on HP/UX 10.20 with gcc 2.95.2.  I had to add

     extern int h_errno;

to ~pkg/ldap/libraries/libldap/util-int.c (version 1.19) in order to get it 
to compile properly.  All the tests pass, but I haven't done more testing 
than that.