Re: [PATCH] builtin/init-db.c: eliminate -Wformat warning on Solaris

I will queue this directly on 'maint', as I do not think it is worth
fixing immediately on top of 2c050e0 (i18n: mark init-db messages for
translation, 2011-04-10) and merging all the way down to the now-ancient
v1.7.5.X series.

Thanks.