user-manual: Explain what submodules are good for.

diff --git a/tree-walk.h b/tree-walk.h
index 43458cf8ce3a115ee22bb3512749d456c93f783c..db0fbdc701f1ef63cdc1a8b7d5c5e72322f91426 100644 (file)
--- a/tree-walk.h
+++ b/tree-walk.h
@@ -22,12 +22,11 @@ static inline const unsigned char *tree_entry_extract(struct tree_desc *desc, co
 
 static inline int tree_entry_len(const char *name, const unsigned char *sha1)
 {
-       return (char *)sha1 - (char *)name - 1;
+       return (const char *)sha1 - name - 1;
 }
 
 void update_tree_entry(struct tree_desc *);
 void init_tree_desc(struct tree_desc *desc, const void *buf, unsigned long size);
-const unsigned char *tree_entry_extract(struct tree_desc *, const char **, unsigned int *);
 
 /* Helper function that does both of the above and returns true for success */
 int tree_entry(struct tree_desc *, struct name_entry *);