Did you look at the line?
#ifndef(HOSTS_C)
Just remove the brackets. It should read
#ifndef HOSTS_C
And unless I'm very mistaken, it's been like that since 1.3.48!!!!
-- [=======================================================================] [ Kevin Lentin |finger kevinl@fangorn.cs.monash.edu.au| ] [ K.Lentin@cs.monash.edu.au |for PGP public key block. Fingerprint | ] [ Macintrash: 'Just say NO!' |6024308DE1F84314 811B511DBA6FD596 | ] [=======================================================================]