Bugfix: "Unit production requires a right-click before another unit can be produced."

OpenRa.Game/Game.cs

@@ -252,7 +252,8 @@ namespace OpenRa.Game
 				mobile.QueueActivity(new Mobile.MoveTo(unit.Location + new int2(0, 3)));
 			}
 
-			world.Add(unit);
+			world.Add( unit );
+			player.FinishProduction( Rules.UnitCategory[ unit.unitInfo.Name ] );
 
 			if (producer.traits.Contains<RenderWarFactory>())
 				producer.traits.Get<RenderWarFactory>().EjectUnit();

OpenRa.Game/Player.cs

@@ -61,6 +61,11 @@ namespace OpenRa.Game
 			var item = production[ category ];
 			if( item == null ) return;
 			GiveCash( item.TotalCost - item.RemainingCost ); // refund what's been paid so far.
+			FinishProduction( category );
+		}
+
+		public void FinishProduction( string category )
+		{
 			production[ category ] = null;
 		}