Combat.DoExplosion now takes a Target

(needs more refactoring)

OpenRA.Mods.RA/Explodes.cs

@@ -32,8 +32,7 @@ namespace OpenRA.Mods.RA
 				{
 					var unit = self.traits.GetOrDefault<Unit>();
 					var altitude = unit != null ? unit.Altitude : 0;
-					Combat.DoExplosion(e.Attacker, weapon,
-						self.CenterLocation.ToInt2(), altitude);
+					Combat.DoExplosion(e.Attacker, weapon, Target.FromActor(self), altitude);
 				}
 			}
 		}