don't pass world to Widget.Tick, either

OpenRA.Game/Game.cs

@@ -112,7 +112,7 @@ namespace OpenRA
 				using (new PerfSample("tick_time"))
 				{
 					lastTime += Settings.Game.Timestep;
-					Widget.DoTick(world);
+					Widget.DoTick();
 					if( world.GameHasStarted && world.LocalPlayer != null )
 						++Viewport.TicksSinceLastMove;
 					Sound.Tick();

OpenRA.Game/Widgets/ChatDisplayWidget.cs

@@ -75,7 +75,7 @@ namespace OpenRA.Widgets
 			recentLines = new List<ChatLine>();	
 		}
 		
-		public override void Tick (World world)
+		public override void Tick()
 		{
 			if (RemoveTime == 0) return;
 			if (--ticksUntilRemove > 0) return;

OpenRA.Game/Widgets/ListBoxWidget.cs

@@ -86,7 +86,7 @@ namespace OpenRA.Widgets
 			return EventBounds;
 		}
 		
-		public override void Tick (World world)
+		public override void Tick ()
 		{
 			if (UpPressed && ListOffset <= 0) ListOffset += ScrollVelocity;
 			if (DownPressed) ListOffset -= ScrollVelocity;

OpenRA.Game/Widgets/ScrollingTextWidget.cs

@@ -44,7 +44,7 @@ namespace OpenRA.Widgets
 			GetBackground = other.GetBackground;
 		}
 
-		public override void Tick(World world)
+		public override void Tick()
 		{
 			if (Text != "")
 			{

OpenRA.Game/Widgets/TextFieldWidget.cs

@@ -97,14 +97,14 @@ namespace OpenRA.Widgets
 
 		int blinkCycle = 10;
 		bool showCursor = true;
-		public override void Tick(World world)
+		public override void Tick()
 		{
 			if (--blinkCycle <= 0)
 			{
 				blinkCycle = 20;
 				showCursor ^= true;
 			}
-			base.Tick(world);
+			base.Tick();
 		}
 
 		public override void DrawInner()

OpenRA.Game/Widgets/ViewportScrollControllerWidget.cs

@@ -122,7 +122,7 @@ namespace OpenRA.Widgets
 			return false;
 		}
 		
-		public override void Tick(World world)
+		public override void Tick()
 		{
 			Edge = ScrollDirection.None;
 			if (Game.Settings.Game.ViewportEdgeScroll && Game.HasInputFocus)

OpenRA.Game/Widgets/Widget.cs

@@ -281,11 +281,11 @@ namespace OpenRA.Widgets
 			}
 		}
 		
-		public virtual void Tick(World world)
+		public virtual void Tick()
 		{
 			if (IsVisible())
 				foreach (var child in Children)
-					child.Tick(world);
+					child.Tick();
 		}
 		
 		public void AddChild(Widget child)
@@ -335,9 +335,9 @@ namespace OpenRA.Widgets
 			return window;
 		}
 		
-		public static void DoTick(World world)
+		public static void DoTick()
 		{
-			RootWidget.Tick(world);
+			RootWidget.Tick();
 		}
 		
 		public static void DoDraw()

OpenRA.Mods.RA/Widgets/BuildPaletteWidget.cs

@@ -78,7 +78,7 @@ namespace OpenRA.Mods.RA.Widgets
 			get { return new Rectangle((int)(paletteOrigin.X) - 24, (int)(paletteOrigin.Y), 215, 48 * numActualRows); }
 		}
 		
-		public override void Tick(World world)
+		public override void Tick()
 		{
 			VisibleQueues.Clear();
 			
@@ -101,7 +101,7 @@ namespace OpenRA.Mods.RA.Widgets
 			
 			TickPaletteAnimation(world);
 			
-			base.Tick(world);
+			base.Tick();
 		}
 		
 		void TickPaletteAnimation(World world)

OpenRA.Mods.RA/Widgets/RadarBinWidget.cs

@@ -121,7 +121,7 @@ namespace OpenRA.Mods.RA.Widgets
 
 		public override void DrawInner()
 		{
-			if( world.LocalPlayer == null ) return;
+			if( world == null || world.LocalPlayer == null ) return;
 
 			radarCollection = "radar-" + world.LocalPlayer.Country.Race;
 
@@ -155,13 +155,12 @@ namespace OpenRA.Mods.RA.Widgets
 					Game.Renderer.DisableScissor();
 				}
 			}
-			
-
 		}
 
 		int updateTicks = 0;
-		public override void Tick(World w)
+		public override void Tick()
 		{
+			var w = Game.world;
 			if( world != w )
 				SetWorld( w );