fix 'local variable socket referenced before assignment'
fix 'local variable socket referenced before assignment'

quite stealty: if connection.select() fails, an exception gets thrown,
the finally block executed, and 'socket' is then not defined.

valdur55/py3status,tobes/py3status,ultrabug/py3status,Andrwe/py3status,valdur55/py3status,valdur55/py3status,tobes/py3status,ultrabug/py3status,Andrwe/py3status,guiniol/py3status,guiniol/py3status,ultrabug/py3status