Fix exploding walls

OpenRA.Mods.RA/Render/WithBuildingExplosion.cs

@@ -0,0 +1,28 @@
+#region Copyright & License Information
+/*
+ * Copyright 2007-2011 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,
+ * see COPYING.
+ */
+#endregion
+
+using OpenRA.Mods.RA.Buildings;
+using OpenRA.Mods.RA.Effects;
+using OpenRA.Traits;
+
+namespace OpenRA.Mods.RA.Render
+{
+	class WithBuildingExplosionInfo : TraitInfo<WithBuildingExplosion> { }
+	class WithBuildingExplosion : INotifyKilled
+	{
+		public void Killed(Actor self, AttackInfo e)
+		{
+			var bi = self.Info.Traits.Get<BuildingInfo>();
+			FootprintUtils.UnpathableTiles(self.Info.Name, bi, self.Location).Do(
+				t => self.World.AddFrameEndTask(
+					w => w.Add(new Explosion(w, Traits.Util.CenterOfCell(t), "building", false, 0))));
+		}
+	}
+}