Fix issue where llSetPayPrice on either one of a clone prim in the same OpenSimulator session would change the prices on both prims.

This is because the PayPrice array refernence was being memberwise cloned and not the array itself.
Addresses http://opensimulator.org/mantis/view.php?id=6639

OpenSim/Region/Framework/Scenes/SceneObjectPart.cs

@@ -1799,6 +1799,8 @@ namespace OpenSim.Region.Framework.Scenes
             Array.Copy(Shape.ExtraParams, extraP, extraP.Length);
             dupe.Shape.ExtraParams = extraP;
 
+            dupe.PayPrice = (int[])PayPrice.Clone();
+
             dupe.DynAttrs.CopyFrom(DynAttrs);
             
             if (userExposed)