this.order is undefined in INDIVIDUAL.PATROL.MovementUpdate

[elexis]

In this r22537 replay,

after sending a Patrol order to these units, I got this error message:

TypeError: this.order is undefined
  UnitAI.prototype.UnitFsmSpec.INDIVIDUAL.PATROL.MovementUpdate@simulation/components/UnitAI.js:1594:5
  FSM.prototype.ProcessMessage@simulation/helpers/FSM.js:265:12
  UnitAI.prototype.OnMotionUpdate@simulation/components/UnitAI.js:3866:2
ERROR: Script message handler OnMotionUpdate failed
ERROR: JavaScript error: simulation/components/UnitAI.js line 1594
TypeError: this.order is undefined
  UnitAI.prototype.UnitFsmSpec.INDIVIDUAL.PATROL.MovementUpdate@simulation/components/UnitAI.js:1594:5
  FSM.prototype.ProcessMessage@simulation/helpers/FSM.js:265:12
  UnitAI.prototype.OnMotionUpdate@simulation/components/UnitAI.js:3866:2
ERROR: Script message handler OnMotionUpdate failed

[wraitii]

Introduced by ​Phab:rP22526 L1589 of UnitAI.js . I call FinishOrder() but don't return and thus this.order is undefined below it.

I'll check the diff for other similar mistakes since this is not so obvious a bug form reading the code and fix it.

Thanks for reporting.

[wraitii]

In 22546:

Fix patrol order and make the relaxed range check into a constant.

Introduced by rP22526.

Reported By: elexis

Fixes #5531 .

Differential Revision: ​https://code.wildfiregames.com/D2118