Corner case fix, undefined plugin leaves null in plugin list, since we iterate it, need to avoid those.  \!strict refs #9745
Corner case fix, undefined plugin leaves null in plugin list, since we iterate it, need to avoid those.  \!strict refs #9745

git-svn-id: 674a2d6b1e32e53f607eb824547723f32280967e@20071 560b804f-0ae3-0310-86f3-f6aa0a117693

redaktor/deliteful