[PATCH] tree_entry_interesting: Only recurse when the pathspec is a leading path component

["Björn Steinbrink" <B.Steinbrink@gmx.de>]

Previously the code did a simple prefix match, which means that it
treated for example "foo/" as a subdirectory of "f".

Signed-off-by: Björn Steinbrink <B.Steinbrink@gmx.de>
---
I'm not exactly happy with the commit message, but that's the best I
could come up with. Probably shows how little I know about that code :-/
The test suite still passes and I'll try to provide a new testcase
tonight or tommorow.

 tree-diff.c |   12 +++++++++---
 1 files changed, 9 insertions(+), 3 deletions(-)

diff --git a/tree-diff.c b/tree-diff.c
index 9f67af6..b05d0f4 100644
--- a/tree-diff.c
+++ b/tree-diff.c
@@ -118,10 +118,16 @@ static int tree_entry_interesting(struct tree_desc *desc, const char *base, int
 				continue;
 
 			/*
-			 * The base is a subdirectory of a path which
-			 * was specified, so all of them are interesting.
+			 * If the base is a subdirectory of a path which
+			 * was specified, all of them are interesting.
 			 */
-			return 2;
+			if (!matchlen ||
+			    base[matchlen] == '/' ||
+			    match[matchlen - 1] == '/')
+				return 2;
+
+			/* Just a random prefix match */
+			continue;
 		}
 
 		/* Does the base match? */
-- 
1.6.2.1.426.gf94cd