Return empty string for dirtree_path() of "" (instead of NULL).

1 files changed, 1 insertions, 1 deletions

diff --git a/lib/dirtree.c b/lib/dirtree.c
index 9712ee14..37581829 100644
--- a/lib/dirtree.c
+++ b/lib/dirtree.c
@@ -90,7 +90,7 @@ char *dirtree_path(struct dirtree *node, int *plen)
   ll = len = plen ? *plen : 0;
   for (nn = node; nn; nn = nn->parent) if (*nn->name) len += strlen(nn->name)+1;
   if (plen) *plen = len;
-  if (!len) return 0;
+  if (!len) return xstrdup("");
   path = xmalloc(len)+len-ll;
   for (nn = node; nn; nn = nn->parent) if ((len = strlen(nn->name))) {
     *--path = '/'*(nn != node);