[Dxbase] crash bug in DXB2007

[Chris Codella, W2PA]

More on this, FYI.
Conditions for crash here, by the way, Win XP Pro, 2G memory, IBM 
Thinkpad T41p.

The common theme is to bring up find window, then prev-Q window, using 
icons both times, then kill prev-Q, then kill find - die.  It doesn't 
matter which sub-window you start in.  It doesn't matter whether a 
search criteria or a prev-Q criteria is filled in or not.

I did find two cases where it does *not* crash:

Bringing up the two windows using the menus instead of the icons does 
*not* cause the crash. 
Bringing up find with icon, then prev-Q with icon does *not* cause crash.

But bringing up find with menu, then prev-Q with icon *does* cause crash.

Of course, if you bring up the prev-Q window first, it won't let you 
bring up search so no crash possible that way either.