basic Sync checking. No protocol stuff yet; just checks that input events are well-behaved.

OpenRa.Game/Traits/Chronoshiftable.cs

@@ -8,9 +8,11 @@ namespace OpenRa.Game.Traits
 	class Chronoshiftable : IResolveOrder, ISpeedModifier, ITick
 	{
 		// Return-to-sender logic
+		[Sync]
 		int2 chronoshiftOrigin;
+		[Sync]
 		int chronoshiftReturnTicks = 0;
-
+
 		public Chronoshiftable(Actor self) { }
 
 		public void Tick(Actor self)
@@ -65,7 +67,7 @@ namespace OpenRa.Game.Traits
 				self.QueueActivity(new Activities.Teleport(order.TargetLocation));
 
 				var power = self.Owner.SupportPowers[order.TargetString].Impl;
-				power.OnFireNotification(self, self.Location);
+				power.OnFireNotification(self, self.Location);
 			}
 		}