avoid unneccessary float calculations and conversions

OpenRA.Game/Traits/Health.cs

@@ -75,7 +75,7 @@ namespace OpenRA.Traits
 
 			var oldState = this.DamageState;
 			/* apply the damage modifiers, if we have any. */
-			var modifier = (float)self.TraitsImplementing<IDamageModifier>()
+			var modifier = self.TraitsImplementing<IDamageModifier>()
 				.Concat(self.Owner.PlayerActor.TraitsImplementing<IDamageModifier>())
 				.Select(t => t.GetDamageModifier(attacker, warhead)).Product();
 

OpenRA.Mods.RA/Activities/CaptureActor.cs

@@ -31,7 +31,7 @@ namespace OpenRA.Mods.RA.Activities
 
 			var capturesInfo = self.Info.Traits.Get<CapturesInfo>();
 			var health = target.Trait<Health>();
-			int damage = (int)(0.25 * health.MaxHP);
+			int damage = health.MaxHP / 4;
 
 			// Need to be next to building, TODO: stop capture when going away
 			var mobile = self.Trait<Mobile>();