Little update, mainly to resolve a crash reported when humans are trying to find a free crew quarters.

Have also optimised workers job distance check, so now much simpler calculations to see if droid has enough battery to get to a job and back to your station. This gives quite a fps boost if you've made a very large station and/or have lots of workers. May need some tweaking, so let me know if you see droids on emergency power very often.

Patch notes:-

• Improve: Worker check job distance, optimise battery/distance tests.
  
• Fix: Crash on human crew quarters lookup (introduced in v0.5.0.36).
  
• Fix: Initial zoom judder.
  
• Fix: Pirate dock pipe animation scale correctly.