Fix exception on startup when no child panes exist, fixes #9808 !strict.
Fix exception on startup when no child panes exist, fixes #9808 !strict.

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@19997 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful