[PATH] fix bootstrap failure on ppc-darwin

[Gabriel Dos Reis]

Andrew Pinski <pinskia@physics.uc.edu> writes:

| 	(binding_entry_make): Make entry->chain NULL after getting an entry.
| 	fix the spelling of chain in a comment.

The true mistake seems to  be this.

For some reason, I got zeroed heap-allocated ememory on an i686-pc-linux

Thanks,

-- Gaby