[PATCH] Anal retentive 'const unsigned char *sha1'

Make 'sha1' parameters const where possible

Signed-off-by: Jason McMullan <jason.mcmullan@timesys.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

tree.c

@@ -73,7 +73,7 @@ int read_tree(void *buffer, unsigned long size, int stage)
 	return read_tree_recursive(buffer, size, "", 0, stage);
 }
 
-struct tree *lookup_tree(unsigned char *sha1)
+struct tree *lookup_tree(const unsigned char *sha1)
 {
 	struct object *obj = lookup_object(sha1);
 	if (!obj) {