[patch] fix for crash in python pretty-printer

[Tom Tromey]

>>>>> "Paul" == Paul Pluzhnikov <ppluzhnikov@google.com> writes:

Paul> Attached is a fix (applies both to mainline and archer-tromey-python).
Paul> Tested on Linux/x86_64 with no regressions.

This is ok.  Thanks.

Paul> P.S. Is there an "easy" way to find such mis-uses of TRY_CATCH?
Paul> This one took me 2 hours to find :-(

Not that I know of :(

You could try coccinelle, I suppose.  I've run it for other purposes
on gdb, though with mixed results.

Tom