pulling IEffect out of Bullet in prep for Explosion

OpenRa.Game/Bullet.cs

@@ -4,13 +4,20 @@ using System.Linq;
 using System.Text;
 using OpenRa.Game.GameRules;
 using IjwFramework.Types;
-using OpenRa.Game.Graphics;
+using OpenRa.Game.Graphics;
 
 namespace OpenRa.Game
-{
-	class Bullet
-	{
-		public readonly Player Owner;
+{
+	interface IEffect
+	{
+		void Tick(Game g);
+		IEnumerable<Pair<Sprite, float2>> Render();
+		Player Owner { get; }
+	}
+
+	class Bullet : IEffect
+	{
+		public Player Owner { get; private set; }
 		readonly Actor FiredBy;
 		readonly WeaponInfo Weapon;
 		readonly ProjectileInfo Projectile;
@@ -46,10 +53,13 @@ namespace OpenRa.Game
 			if (t == 0)
 				game.PlaySound(Weapon.Report + ".aud", false);
 
-			t += 40;
-
-			if (t > TotalTime())		/* remove finished bullets */
-				game.world.AddFrameEndTask(w => w.Remove(this));
+			t += 40;
+
+			if (t > TotalTime())		/* remove finished bullets */
+			{
+				game.world.AddFrameEndTask(w => w.Remove(this));
+				game.PlaySound("kaboom25.aud", false);
+			}
 		}
 
 		public IEnumerable<Pair<Sprite, float2>> Render()