BF [2947768] - Changing AttributeSet does not reset AttributeSetInstance

https://sourceforge.net/tracker/?func=detail&atid=879332&aid=2947768&group_id=176962
Use deleteEx instead of delete(). Thank's to Teo's advice.

base/src/org/compiere/model/MProduct.java

@@ -616,7 +616,9 @@ public class MProduct extends X_M_Product
 			MAttributeSetInstance asi = new MAttributeSetInstance(getCtx(), getM_AttributeSetInstance_ID(), get_TrxName());
 			setM_AttributeSetInstance_ID(0);
 			// Delete the old m_attributesetinstance
-			if (!asi.delete(true, get_TrxName()))
+			try {
+				asi.deleteEx(true, get_TrxName());
+			} catch (AdempiereException ex)
 			{
 				log.saveError("Error", "Error deleting the AttributeSetInstance");
 				return false;