[PATCH] build-many-glibcs: don't crash if email is not configured

[Joseph Myers]

On Thu, 16 Feb 2017, Zack Weinberg wrote:

> The 'bot-cycle' action for build-many-glibcs is a convenient way to
> not have to remember all the steps in keeping a many-glibcs tree up
> to date ... or it would be, if the script could send mail _optionally_.
> Make it so by skipping the mail step if mail isn't configured.
> 
> OK?
> 
> 	* scripts/build-many-glibcs.py (bot_build_mail):  If the
> 	bot_config does not contain all of the necessary email-
> 	related settings, just print a warning and continue.

I'm not sure what self.email_warning is for, given it's only set to True 
right before the script exits (so will always be False when tested).  OK 
without that variable.

-- 
Joseph S. Myers
joseph@codesourcery.com