Hotmail / outlook text/plain mails won't work anymore
With the fix for #211 (closed) we introduced a regression so schleuder barfs on text/plain messages from outlook:
undefined method `[]' for nil:NilClass
/opt/schleuder/lib/schleuder/filters/hotmail_message_filter.rb:6:in `fix_hotmail_messages!'
/opt/schleuder/lib/schleuder/filters_runner.rb:40:in `block in run'
/opt/schleuder/lib/schleuder/filters_runner.rb:38:in `map'
/opt/schleuder/lib/schleuder/filters_runner.rb:38:in `run'
/opt/schleuder/lib/schleuder/runner.rb:60:in `run_filters'
/opt/schleuder/lib/schleuder/runner.rb:10:in `run'
/opt/schleuder/lib/schleuder/cli.rb:35:in `work'