Progress

• Added a landslide "trap".
  
• The wind bridge mechanism now delays two turns before rotating, giving the player time to get his party to safety if he's paying attention.
  
• Added a risky but necessary kernel change to fix the lingering LOS bug. This bug was caused by a leftover map view from the previous session, which I was neglecting to clean up (and feeling guilty about it, but not guilty enough to try and fix it for this release, until now). No doubt this change will reveal a horde of bugs due to improper teardown in various situations.