Crashes when "balloons" enabled

[gds]

Doug Graham wrote:
> Not sure whether this helps or not as it probably doesn't fix the root
> cause, but I ran into this same problem some time ago and "fixed" it
> with the following patch (from Insight 6.5):

Applied patch. Think it helped. Was able to do "so gdbinit" once after 
inspecting variables in balloons but crashed the second time. Will try a 
similar null check at the point where mine is crashing. Thanks.
-gene