[PATCH] emacs: fix notmuch-search-line-faces defcustom

[Matt Armstrong]

Mark Walters <markwalters1009 at gmail.com> writes:

> In commit 2a7b11b064233afc4feead876fa396e3c18a6b91 the default value
> for notmuch-search-line-faces was changed so that it didn't match the
> specification in the corresponding defcustom. This meant that it was
> difficult for the user to customize this variable as they got a type
> mismatch error.

Mark, thanks for fixing the defcustom that I broke.  :-) I have verified
that it now works for me.  This testing induced me to zero-out my
notmuch face customizations, which reminded me that the defaults are bad
in places for Emacs themes with dark backgrounds.  I'll send a patch for
that.