osv needs to be imported in report_aeroo_direct_print.py

[chesty]

 File "/home/michael/odoo/openerp/api.py", line 268, in wrapper
    return old_api(self, *args, **kwargs)
  File "/home/michael/odoo/openerp/addons/base/ir/ir_actions.py", line 837, in run_action_code_multi
    eval(action.code.strip(), eval_context, mode="exec", nocopy=True)  # nocopy allows to return 'action'
  File "/home/michael/odoo/openerp/tools/safe_eval.py", line 314, in safe_eval
    return eval(c, globals_dict, locals_dict)
  File "", line 6, in <module>
  File "/home/michael/odoo/openerp/api.py", line 268, in wrapper
    return old_api(self, *args, **kwargs)
  File "/home/michael/odoo/openerp/addons/report_aeroo_direct_print/report_aeroo_direct_print.py", line 58, in report_to_printer
    else:
ValueError: "global name 'osv' is not defined" while evaluating
u"# 69adc1e107f7f7d035d7baf04342e1ca #\nreport_action_id = 207\ncontext['report_action_id'] = report_action_id\nprint_actions_obj = self.pool.get('aeroo.print_actions')\nprinter = print_actions_obj._get_default_printer(cr, uid, context)\nprint_actions_obj.report_to_printer(cr, uid, [obj.id], report_action_id, printer, context=context)"