fix bridge damage states

OpenRA.Game/Traits/Bridge.cs

@@ -144,9 +144,28 @@ namespace OpenRA.Traits
 			return b != null && b.self.IsInWorld && b.self.Info.Traits.Get<BridgeInfo>().Long;
 		}
 
+		// HACK because paul broke the world with his extended damage states... :(
+		static DamageState MapDamageState(DamageState ds)
+		{
+			switch (ds)
+			{
+				case DamageState.Normal:
+				case DamageState.ThreeQuarter:
+					return DamageState.Normal;
+
+				case DamageState.Half:
+				case DamageState.Quarter:
+					return DamageState.Half;
+
+				case DamageState.Dead:
+				default:
+					return DamageState.Dead;
+			}
+		}
+
 		void UpdateState()
 		{
-			var ds = self.GetDamageState();
+			var ds = MapDamageState(self.GetDamageState());
 			if (!self.Info.Traits.Get<BridgeInfo>().Long)
 			{
 				state = (int)ds;