[PATCH] Kill a bunch of pointer sign warnings for gcc4

- Raw hashes should be unsigned char.
 - String functions want signed char.
 - Hash and compress functions want unsigned char.

Signed-off By: Brian Gerst <bgerst@didntduck.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

ls-tree.c

@@ -24,7 +24,7 @@ static void print_path_prefix(struct path_prefix *prefix)
 }
 
 static void list_recursive(void *buffer,
-			   const unsigned char *type,
+			   const char *type,
 			   unsigned long size,
 			   struct path_prefix *prefix)
 {