[Jprogramming] Debug Signal - comments requested

[Don Guinn]

I might add, this is simplified to show concept or what I think it should
look like. If the next to top in the stack is a definition it's name and
line number need to be adjusted also. If debug is turned on I don't know
what the best way to do this is. Whether to display the next to top or the
top of the stack. And I don't know what will happen if the next to top is
unnamed. I haven't figured out a way to test it.