Add one.

--HG--
branch : HEAD
diff --git a/TODO b/TODO
index 01be708..44e1520 100644
--- a/TODO
+++ b/TODO
@@ -1,3 +1,4 @@
+* make zip_add return index of new file entry
 * add functions to:
   . set compression method for new/changed entry
   . set last modification time for entry