Fix the bug in CRM_Mailing_BAO_Mailing::add() where the DAO was being instantiated instead of the BAO, as later the create() method expects it to be BAO having getRecipients() method towards the end.
Merge pull request #4087 from robinmitra/master

Fix a bug in CRM_Mailing_BAO_Mailing::add() with wrong class instantiation