Handle missing space marker in unified diff during header fixup

* vc/diff-mode.el (diff-fixup-modifs): Handle empty line in
context of unified diff.

2 files changed, 8 insertions, 0 deletions

diff --git a/lisp/ChangeLog b/lisp/ChangeLog
index 458ab57d011..2a1d3b94427 100644
--- a/lisp/ChangeLog
+++ b/lisp/ChangeLog
@@ -1,3 +1,8 @@
+2014-08-16  Andreas Schwab  <schwab@linux-m68k.org>
+
+        * vc/diff-mode.el (diff-fixup-modifs): Handle empty line in
+        context of unified diff.
+
 2014-08-16  Paul Eggert  <eggert@cs.ucla.edu>
 
         Add dependencies to fix loaddefs race during parallel builds.
diff --git a/lisp/vc/diff-mode.el b/lisp/vc/diff-mode.el
index 4908c5f4961..d4e973956c8 100644
--- a/lisp/vc/diff-mode.el
+++ b/lisp/vc/diff-mode.el
@@ -1220,6 +1220,9 @@ else cover the whole buffer."
                 (?- (cl-incf minus))
                 (?! (cl-incf bang))
                 ((or ?\\ ?#) nil)
+                (?\n (if diff-valid-unified-empty-line
+                         (cl-incf space)
+                       (setq space 0 plus 0 minus 0 bang 0)))
                 (_  (setq space 0 plus 0 minus 0 bang 0)))
             (cond
              ((looking-at diff-hunk-header-re-unified)