Projectile damage range is set to the radius of the item's collider if the range is not given in the xml. Structure.AddDamage uses the edges of the sections to calculate the distance to a damage source, i.e. the damage area only has to "touch" the section to do damage. Closes #479

Barotrauma/BarotraumaShared/Source/Characters/Attack.cs

@@ -52,7 +52,7 @@ namespace Barotrauma
         public float Range { get; private set; }
 
         [Serialize(0.0f, false)]
-        public float DamageRange { get; private set; }
+        public float DamageRange { get; set; }
 
         [Serialize(0.0f, false)]
         public float Duration { get; private set; }