[RFC PATCH 2/7] dir.c: fix off-by-one error in match_pathspec_item

[Elijah Newren <newren@gmail.com>]

For a pathspec like 'foo/bar' comparing against a path named "foo/",
namelen will be 4, and match[namelen] will be 'b'.  The correct location
of the directory separator is namelen-1.

The reason the code worked anyway was that the following code immediately
checked whether the first matchlen characters matched (which they do) and
then bailed and return MATCHED_RECURSIVELY anyway since wildmatch doesn't
have the ability to check if "name" can be matched as a directory (or
prefix) against the pathspec.

Signed-off-by: Elijah Newren <newren@gmail.com>
---
 dir.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/dir.c b/dir.c
index 19212129f0..c915a69385 100644
--- a/dir.c
+++ b/dir.c
@@ -384,7 +384,7 @@ static int match_pathspec_item(const struct pathspec_item *item, int prefix,
 	if (flags & DO_MATCH_SUBMODULE) {
 		/* name is a literal prefix of the pathspec */
 		if ((namelen < matchlen) &&
-		    (match[namelen] == '/') &&
+		    (match[namelen-1] == '/') &&
 		    !ps_strncmp(item, match, name, namelen))
 			return MATCHED_RECURSIVELY;
 
-- 
2.17.0.7.g0b50f94d69