Fix npe when adding a null element in a collection

Change-Id: I946e0c911e100ffcbf123eb6bef44c26c31a46cc
(cherry picked from commit 4bcc32231a6ad94d6f3ea43180b0b5d1e92dbd4e)
1 file changed
tree: 8887fc6ce008b238a34db1efe567157788a50cb0
  1. BUCK
  2. app/
  3. pom.xml
  4. web/