pq04948.st REUSABLE MENU CREATED AS NONVISUAL CAUSES STACK OVERFLOW

He has a nonvisual part in which he created a reusable menubar with one menu 
item disabled.  He adds this to a visual part and connects it to the menu of a window.
Test is okay.  Change the nonvisual part such that the menu item is now enabled.  
Test the visual part, and you'll receive a stack overflow.

File in pq04948.st to fix this problem.