Wrong TUs remaining shown when crossing a door diagonally

[MarkusRamikin]

Tested both OXC and OXCE, the problem exists in both.

The Savegame included happens to be for TFTD. To replicate, have the Time Units option turned on, then click diagonally down from the soldier. The soldier has 48 mvs and the path shows arriving with 40 moves left. This is of course wrong, since the moves required are 4 (opening door)+6(diagonal step), and the soldier in fact arrives with 38 moves left.

mvs across door calculation bug.zip