[PATCH] Don't link libnotmuch if libutil isn't linked in properly.

[David Bremner]

On Sun, 13 Nov 2011 11:34:42 -0500, Tom Prince <tom.prince at ualberta.net> wrote:
> For some reason, on my machine, the link is picking up
> /usr/lib/libutil.so instead of util/libutil.a. This causes there to be
> undefined symbols in libnotmuch, making it unuseable. This patch causes
> the link to fail instead.

I pushed this to master, let's see if it breaks for anyone.

d