Fix segfault on ppc when browsing tree

3 files changed, 3 insertions, 3 deletions

diff --git a/ui-blob.c b/ui-blob.c
index 2ccd31d..89330ce 100644
--- a/ui-blob.c
+++ b/ui-blob.c
@@ -21,59 +21,59 @@ static int walk_tree(const unsigned char *sha1, const char *base,int baselen,
 	memmove(matched_sha1,sha1,20);
 	return 0;
 }
 
 void cgit_print_blob(const char *hex, char *path, const char *head)
 {
 
 	unsigned char sha1[20];
 	enum object_type type;
 	char *buf;
 	unsigned long size;
 	struct commit *commit;
 	const char *paths[] = {path, NULL};
 
 	if (hex) {
 		if (get_sha1_hex(hex, sha1)){
 			cgit_print_error(fmt("Bad hex value: %s", hex));
 			return;
 		}
 	} else {
 		if (get_sha1(head,sha1)) {
 			cgit_print_error(fmt("Bad ref: %s", head));
 			return;
 		}
 	}
 
 	type = sha1_object_info(sha1, &size);
 
 	if((!hex) && type == OBJ_COMMIT && path) {
 		commit = lookup_commit_reference(sha1);
 		match_path = path;
 		matched_sha1 = sha1;
-		read_tree_recursive(commit->tree, NULL, 0, 0, paths, walk_tree, NULL);
+		read_tree_recursive(commit->tree, "", 0, 0, paths, walk_tree, NULL);
 		type = sha1_object_info(sha1,&size);
 	}
 
 	if (type == OBJ_BAD) {
 		cgit_print_error(fmt("Bad object name: %s", hex));
 		return;
 	}
 
 	buf = read_sha1_file(sha1, &type, &size);
 	if (!buf) {
 		cgit_print_error(fmt("Error reading object %s", hex));
 		return;
 	}
 
 	buf[size] = '\0';
 	ctx.page.mimetype = ctx.qry.mimetype;
 	if (!ctx.page.mimetype) {
 		if (buffer_is_binary(buf, size))
 			ctx.page.mimetype = "application/octet-stream";
 		else
 			ctx.page.mimetype = "text/plain";
 	}
 	ctx.page.filename = path;
 	cgit_print_http_headers(&ctx);
 	write(htmlfd, buf, size);
 }
diff --git a/ui-plain.c b/ui-plain.c
index a4ce077..66cb19c 100644
--- a/ui-plain.c
+++ b/ui-plain.c
@@ -59,36 +59,36 @@ static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
 {
 	if (S_ISDIR(mode))
 		return READ_TREE_RECURSIVE;
 
 	if (S_ISREG(mode) && !strncmp(base, match_path, baselen) &&
 	    !strcmp(pathname, match_path + baselen))
 		print_object(sha1, pathname);
 
 	return 0;
 }
 
 void cgit_print_plain(struct cgit_context *ctx)
 {
 	const char *rev = ctx->qry.sha1;
 	unsigned char sha1[20];
 	struct commit *commit;
 	const char *paths[] = {ctx->qry.path, NULL};
 
 	if (!rev)
 		rev = ctx->qry.head;
 
 	curr_rev = xstrdup(rev);
 	if (get_sha1(rev, sha1)) {
 		html_status(404, "Not found", 0);
 		return;
 	}
 	commit = lookup_commit_reference(sha1);
 	if (!commit || parse_commit(commit)) {
 		html_status(404, "Not found", 0);
 		return;
 	}
 	match_path = ctx->qry.path;
-	read_tree_recursive(commit->tree, NULL, 0, 0, paths, walk_tree, NULL);
+	read_tree_recursive(commit->tree, "", 0, 0, paths, walk_tree, NULL);
 	if (!match)
 		html_status(404, "Not found", 0);
 }
diff --git a/ui-tree.c b/ui-tree.c
index f53ab64..a164767 100644
--- a/ui-tree.c
+++ b/ui-tree.c
@@ -251,35 +251,35 @@ static int walk_tree(const unsigned char *sha1, const char *base, int baselen,
  *   path: path to tree or blob
  */
 void cgit_print_tree(const char *rev, char *path)
 {
 	unsigned char sha1[20];
 	struct commit *commit;
 	const char *paths[] = {path, NULL};
 
 	if (!rev)
 		rev = ctx.qry.head;
 
 	curr_rev = xstrdup(rev);
 	if (get_sha1(rev, sha1)) {
 		cgit_print_error(fmt("Invalid revision name: %s", rev));
 		return;
 	}
 	commit = lookup_commit_reference(sha1);
 	if (!commit || parse_commit(commit)) {
 		cgit_print_error(fmt("Invalid commit reference: %s", rev));
 		return;
 	}
 
 	html("path: <a href='");
 	html_attr(cgit_pageurl(ctx.qry.repo, "tree", fmt("h=%s", rev)));
 	html("'>root</a>");
 
 	if (path == NULL) {
 		ls_tree(commit->tree->object.sha1, NULL);
 		return;
 	}
 
 	match_path = path;
-	read_tree_recursive(commit->tree, NULL, 0, 0, paths, walk_tree, NULL);
+	read_tree_recursive(commit->tree, "", 0, 0, paths, walk_tree, NULL);
 	ls_tail();
 }