celery.utils.mail: Fixed typo server -> client

celery/utils/mail.py

@@ -5,6 +5,7 @@ try:
 except ImportError:
     from email.MIMEText import MIMEText
 
+
 class Message(object):
 
     def __init__(self, to=None, sender=None, subject=None, body=None,
@@ -37,13 +38,12 @@ class Mailer(object):
         client = smtplib.SMTP(self.host, self.port)
 
         if self.user and self.password:
-            server.login(self.user, self.password)
+            client.login(self.user, self.password)
 
         client.sendmail(message.sender, message.to, str(message))
         client.quit()
 
 
-
 def mail_admins(subject, message, fail_silently=False):
     """Send a message to the admins in conf.ADMINS."""
     from celery import conf