Converts InfDeath from integer to string.

Wire up updated DeathSounds for all mods.

OpenRA.Mods.RA/Explodes.cs

@@ -1,6 +1,6 @@
 #region Copyright & License Information
 /*
- * Copyright 2007-2011 The OpenRA Developers (see AUTHORS)
+ * Copyright 2007-2014 The OpenRA Developers (see AUTHORS)
  * This file is part of OpenRA, which is free software. It is made
  * available to you under the terms of the GNU General Public License
  * as published by the Free Software Foundation. For more information,
@@ -21,7 +21,7 @@ namespace OpenRA.Mods.RA
 		public readonly string EmptyWeapon = "UnitExplode";
 
 		public readonly int Chance = 100;
-		public readonly int[] InfDeath = null;
+		public readonly string[] InfDeath = { };
 
 		public object Create(ActorInitializer init) { return new Explodes(this); }
 	}