[PATCH] lib: Fix RegexpPostingSource

[David Bremner]

David Bremner <david at tethera.net> writes:

> From: Olly Betts <olly at survex.com>
>
> Remove incorrect skipping to first match from init(), and add explicit
> skip_to() and check() methods to work around xapian-core bug (the
> check() method will also improve speed when filtering by one of
> these).

Pushed to master and release. Thanks again to olly for braving "other
people's code".

d