More accurate and reliable submarine-level collisions, looping OnUse sounds bugfix, new music clips, item sprites removed from limbs when someone else loots the item, Camera.WorldView fix, checking vector.LengthSquared before normalizing to avoid creating a NaN vector

Subsurface/Source/Characters/AI/SteeringManager.cs

@@ -64,6 +64,9 @@ namespace Subsurface
         private Vector2 DoSteeringSeek(Vector2 target, float speed = 1.0f)
         {
             Vector2 targetVel = target - host.Position;
+
+            if (targetVel.LengthSquared() < 0.00001f) return Vector2.Zero;
+
             targetVel = Vector2.Normalize(targetVel) * speed;
             Vector2 newSteering = targetVel - host.Steering;