Fix issue of add/remove a frame at a scene before all key frames of a layer. When you added or removed a frame at a scene before all key frames of a layer, frameline was not updated correctly. It seems nothing happened, but domview is updated. This changeset fix this issue by correcting logic for boundary case.

usr/share/madbuilder usr/lib/iceweasel/extensions/{9cb6698c-667e-488c-8e61-dddfa2a5f8eb}