bug#17861: log-edit-summary face wrongly applied

[Glenn Morris]

Package: emacs
Version: 24.3.91
Severity: minor

## Just making a test repo:
mkdir foo
cd foo
bzr init
touch 1
bzr add 1

emacs -Q 1
C-x v v
C-a
C-k
Repeat C-k till log buffer is empty. Then enter:

(foo): foo
(bar): bar.
Some more text about bar.

The line "Some more text about bar." gets log-edit-summary face.