move Selectable.Radius into Health

OpenRA.Game/Traits/Health.cs

@@ -22,6 +22,7 @@ namespace OpenRA.Traits
 	public class HealthInfo : ITraitInfo
 	{
 		public readonly int HP = 0;
+		public readonly float Radius = 10;
 		public virtual object Create(ActorInitializer init) { return new Health(init, this); }
 	}
 

OpenRA.Game/Traits/Selectable.cs

@@ -19,7 +19,6 @@ namespace OpenRA.Traits
 		public readonly int[] Bounds = null;
 		[VoiceReference]
 		public readonly string Voice = null;
-		public readonly float Radius = 10;
 	}
 
 	public class Selectable : IPostRenderSelection

OpenRA.Mods.RA/Combat.cs

@@ -151,9 +151,10 @@ namespace OpenRA.Mods.RA
 			// don't hit air units with splash from ground explosions, etc
 			if (!WeaponValidForTarget(args.weapon, target)) return 0f;
 
-			var selectable = target.Info.Traits.GetOrDefault<SelectableInfo>();
-			var radius = selectable != null ? selectable.Radius : 0;			
-			var distance = (int)Math.Max(0, (target.CenterLocation - args.dest).Length - radius);
+			var health = target.Info.Traits.GetOrDefault<HealthInfo>();
+			if( health == null ) return 0f;
+
+			var distance = (int)Math.Max(0, (target.CenterLocation - args.dest).Length - health.Radius);
 			var falloff = (float)GetDamageFalloff(distance / warhead.Spread);
 			var rawDamage = (float)(warhead.Damage * modifier * falloff);
 			var multiplier = (float)warhead.EffectivenessAgainst(target);