make order queuing work for buildings and turreted units, too

OpenRA.Mods.RA/Air/AttackPlane.cs

@@ -27,10 +27,10 @@ namespace OpenRA.Mods.RA.Air
 			return new FlyAttack( newTarget );
 		}
 
-		protected override bool CanAttack(Actor self)
+		protected override bool CanAttack(Actor self, Target target)
 		{
 			// dont fire while landed
-			return base.CanAttack(self) 
+			return base.CanAttack(self, target) 
 				&& self.Trait<Aircraft>().Altitude > 0;
 		}
 	}

OpenRA.Mods.RA/Air/FlyAttack.cs

@@ -28,7 +28,6 @@ namespace OpenRA.Mods.RA.Air
 				Cancel( self );
 
 			var attack = self.Trait<AttackPlane>();
-			attack.target = Target;
 			attack.DoAttack( self, Target );
 
 			if( inner == null )

OpenRA.Mods.RA/Air/HeliAttack.cs

@@ -46,7 +46,6 @@ namespace OpenRA.Mods.RA.Air
 			if( !float2.WithinEpsilon( float2.Zero, dist, range * Game.CellSize ) )
 				aircraft.TickMove( 1024 * aircraft.MovementSpeed, desiredFacing );
 
-			attack.target = target;
 			attack.DoAttack( self, target );
 
 			return this;