[1.05] Distance calculations are 1 hex short

Title: Distance calculations are incorrect

Version: 1.05

Details: In the screenshot below this constructor is 5 tiles away from a Thulium resource. There are no lines connecting to this resource nor do I have an option to build a mining starbase. However, the starbase range at this point in the game is 5 so this resource should be connected. The same behavior is noticed with the short range missile volley ability where the effective range should be 3 tiles from the tooltip of the Harpoon missile. However, I need to close to a distance of two tiles to use the ability. 

How to reproduce: Build a constructor and move it out 5 hexes of the starbase resource. 

Variation: Create ship equipped with short range volley ability and get in range of a target within 3 hexes.