Adjust to new calling convention for read_tree_recursive()

In GIT-1.6.0, read_tree_recursive takes an extra void pointer for callback
data. We might want to use this to avoid some global variables, but for now
lets just make sure that we can still compile.

Signed-off-by: Lars Hjemli <hjemli@gmail.com>

ui-blob.c

@@ -13,7 +13,8 @@
 static char *match_path;
 static unsigned char *matched_sha1;
 
-static int walk_tree(const unsigned char *sha1, const char *base,int baselen, const char *pathname, unsigned mode, int stage) {
+static int walk_tree(const unsigned char *sha1, const char *base,int baselen,
+	const char *pathname, unsigned mode, int stage, void *cbdata) {
 	if(strncmp(base,match_path,baselen)
 		|| strcmp(match_path+baselen,pathname) )
 		return READ_TREE_RECURSIVE;
@@ -49,7 +50,7 @@ void cgit_print_blob(const char *hex, char *path, const char *head)
 		commit = lookup_commit_reference(sha1);
 		match_path = path;
 		matched_sha1 = sha1;
-		read_tree_recursive(commit->tree, NULL, 0, 0, paths, walk_tree);
+		read_tree_recursive(commit->tree, NULL, 0, 0, paths, walk_tree, NULL);
 		type = sha1_object_info(sha1,&size);
 	}