Blender Git Loki

Multiview reconstruction: Fix issue with reading .blend files

The issue was caused by attempt to iterate list which pointers were not
properly restored yet. Now the flow is following:

- List pointers gets restored on direct_link_movieclip since those
addresses are guaranteed to be from the current main.

- Self track and clip pointers are also restored on direct link
(i assume self_clip is actually clip itself, so do we really need
this pointer?)

- Other clip and track are restored on lib link since those pointers
might come from linked movie clip.