Fix off-by-one in read_tree_recursive

Found by valgrind.

Signed-off-by: Johannes Schindelin <[email protected]>
Signed-off-by: Junio C Hamano <[email protected]>

Author: dscho

tree.c

@@ -62,6 +62,7 @@ static int match_tree_entry(const char *base, int baselen, const char *path, uns
 				continue;
 			/* pathspecs match only at the directory boundaries */
 			if (!matchlen ||
+			    baselen == matchlen ||
 			    base[matchlen] == '/' ||
 			    match[matchlen - 1] == '/')
 				return 1;