Fixed missing 'obj_id' variable

replaced 'obj_id' calls with 'tostring(args.objid)'

EquipmentManager.xml

@@ -450,8 +450,8 @@ function TRIGGER_AddPortalInvItem( name, line, args )
     return 
   end
   table.insert(PortalInventory, 1, tostring(args.objid))
-  dnote(("%s TRIGGER_AddPortalItem(%s) called. Added %s to PortalInventory table."):format(Prepend, obj_id, obj_id))
+  dnote(("%s TRIGGER_AddPortalItem(%s) called. Added %s to PortalInventory table."):format(Prepend, tostring(args.objid), tostring(args.objid)))
-  cnote(("%s Portal(%s) was added Portal Inventory."):format(Prepend, obj_id))
+  cnote(("%s Portal(%s) was added Portal Inventory."):format(Prepend, tostring(args.objid)))
 end
 function TRIGGER_AddInvPortalListItem( name, line, args )
   if not (args.objid) then