[PATCH] Fix possible out-of-bounds array access

[Uwe Zeisberger <zeisberg@informatik.uni-freiburg.de>]

If match is "", match[-1] is accessed.  Let pathspec_matches return 1 in that
case indicating that "" matches everything.

Incidently this fixes git-grep'ing in ".".

Signed-off-by: Uwe Zeisberger <Uwe_Zeisberger@digi.com>
---

 builtin-grep.c |    9 +++++----
 1 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/builtin-grep.c b/builtin-grep.c
index 9806499..f7767bb 100644
--- a/builtin-grep.c
+++ b/builtin-grep.c
@@ -29,10 +29,11 @@ static int pathspec_matches(const char *
 		int matchlen = strlen(match);
 		const char *cp, *meta;
 
-		if ((matchlen <= namelen) &&
-		    !strncmp(name, match, matchlen) &&
-		    (match[matchlen-1] == '/' ||
-		     name[matchlen] == '\0' || name[matchlen] == '/'))
+		if (!matchlen ||
+		    ((matchlen <= namelen) &&
+		     !strncmp(name, match, matchlen) &&
+		     (match[matchlen-1] == '/' ||
+		      name[matchlen] == '\0' || name[matchlen] == '/')))
 			return 1;
 		if (!fnmatch(match, name, 0))
 			return 1;
-- 
1.4.0

-- 
Uwe Zeisberger

http://www.google.com/search?q=12+mol+in+dozen