lots of warnings in ntdb

[Rusty Russell]

Matthieu Patou <mat at samba.org> writes:
> Rusty,
>
> There is tons of warnings in ntdb for almost the same thing:
> from ../lib/ntdb/test/run-30-exhaust-before-expand.c:1:
> ../lib/ntdb/free.c: In function ‘lock_and_alloc’:
> ../lib/ntdb/free.c:686:14: warning: variable ‘len’ set but not used 

Sorry for the delay.  I've patched this now.

Thanks,
Rusty.