RFC: Frame cache s not always available.

[Andrew Cagney]

Jim Kingdon wrote:

> 
> I don't see problems with this patch, except that I think I'd change
> "No stack." to "No frames.".  The former could be pretty confusing
> since it also means things like "there is no memory which GDB knows
> about".

Turns out that everywhere else ``No Stack.'' was being used.
(Besides, no-frames makes me think of web pages - is there a web browser
in GDBtk yet? :-)

	enjoy,
		Andrew