Convert masses of HashSet<string> to BitSet<DamageType>

OpenRA.Mods.Common/Traits/SelfHealing.cs

@@ -9,7 +9,7 @@
  */
 #endregion
 
-using System.Collections.Generic;
+using OpenRA.Primitives;
 using OpenRA.Traits;
 
 namespace OpenRA.Mods.Common.Traits
@@ -32,7 +32,7 @@ namespace OpenRA.Mods.Common.Traits
 		public readonly int DamageCooldown = 0;
 
 		[Desc("Apply the selfhealing using these damagetypes.")]
-		public readonly HashSet<string> DamageTypes = new HashSet<string>();
+		public readonly BitSet<DamageType> DamageTypes = default(BitSet<DamageType>);
 
 		public override object Create(ActorInitializer init) { return new SelfHealing(init.Self, this); }
 	}