Make Tick return bool

OpenRA.Mods.Common/Activities/Air/TakeOff.cs

@@ -62,13 +62,13 @@ namespace OpenRA.Mods.Common.Activities
 				Game.Sound.Play(SoundType.World, aircraft.Info.TakeoffSounds, self.World, aircraft.CenterPosition);
 		}
 
-		public override Activity Tick(Actor self)
+		public override bool Tick(Actor self)
 		{
 			// Refuse to take off if it would land immediately again.
 			if (aircraft.ForceLanding)
 			{
 				Cancel(self);
-				return NextActivity;
+				return true;
 			}
 
 			var dat = self.World.Map.DistanceAboveTerrain(aircraft.CenterPosition);
@@ -78,12 +78,12 @@ namespace OpenRA.Mods.Common.Activities
 				if (aircraft.Info.VTOL)
 				{
 					Fly.VerticalTakeOffOrLandTick(self, aircraft, aircraft.Facing, aircraft.Info.CruiseAltitude);
-					return this;
+					return false;
 				}
 				else
 				{
 					Fly.FlyTick(self, aircraft, aircraft.Facing, aircraft.Info.CruiseAltitude);
-					return this;
+					return false;
 				}
 			}
 
@@ -91,14 +91,14 @@ namespace OpenRA.Mods.Common.Activities
 			if (moveToRallyPoint && NextActivity == null)
 			{
 				if (!aircraft.Info.VTOL && assignTargetOnFirstRun)
-					return NextActivity;
+					return true;
 
 				QueueChild(new AttackMoveActivity(self, () => move.MoveToTarget(self, target)));
 				moveToRallyPoint = false;
-				return this;
+				return false;
 			}
 
-			return NextActivity;
+			return true;
 		}
 	}
 }