Blender Git Loki

Cleanup: Added back explicit object type checks in Animation Exporter

For exporting Lamp Animation or Camera Animation i added utility functions
to fetch the related actions. And only if a matching action was found, the
export was processed for the object. However it turned out that the code
became less clear by this change. So i reverted it back to first check
the object type and only fetch the related action if the object type matches.