[PATCH] python/join.py: Avoid unchecked print in error path

[Andreas Schneider]

On Friday, May 06, 2016 03:55:19 PM Douglas Bagnall wrote:
> With stdout closed, print is not safe.
> 
> `git grep -B2  print |grep -A2 except` suggests there are a lot more of
> these but they haven't troubled me so I'm leaving them alone.
> 
> 
> Douglas

RB+

Please push!