Fix for gnubg crashs after rollout

[gflohr]

Many people are having problems with gnubg crashing after rollouts.  I have found the problem and sent a fix upstream, see https://savannah.gnu.org/bugs/index.php?29880.  The fix is attached to comment #5.

[gflohr]

If you get scared by your browser about untrusted sites use this link instead: http://savannah.gnu.org/bugs/?29880