Comment 2 for bug 1296697

Same error found during smoke testing:
https://jenkins.qa.ubuntu.com/view/Trusty/view/Smoke Testing/job/trusty-desktop-i386-smoke-encrypted_home

Mar 23 11:36:27 utah-21391-trusty-i386 ubiquity: INFO: Setting up swap: [/dev/vda5]
2014-03-23T11:36:27.139740+00:00 utah-21391-trusty-i386 ubiquity: INFO: Setting up swap: [/dev/vda5]
Mar 23 11:36:27 utah-21391-trusty-i386 ubiquity: WARNING: Commented out your unencrypted swap from /etc/fstab
Mar 23 11:36:27 utah-21391-trusty-i386 ubiquity: INFO: Successfully setup encrypted swap!
Mar 23 11:36:27 utah-21391-trusty-i386 ubiquity: stat:
Mar 23 11:36:27 utah-21391-trusty-i386 ubiquity: cannot stat ���UUID=f9979fe9-d619-4329-9a78-db272e07d326���
Mar 23 11:36:27 utah-21391-trusty-i386 ubiquity: : No such file or directory
Mar 23 11:36:27 utah-21391-trusty-i386 ubiquity:
Mar 23 11:36:27 utah-21391-trusty-i386 ubiquity: /usr/share/ubiquity/user-setup-encrypted-swap: 84: /usr/share/ubiquity/user-setup-encrypted-swap: arithmetic expression: expecting primary: "/1048576"
Mar 23 11:36:27 utah-21391-trusty-i386 ubiquity[2502]: debconffilter_done: ubi-usersetup (current: ubi-usersetup)
Mar 23 11:36:27 utah-21391-trusty-i386 ubiquity[2502]: dbfilter_handle_status: ('ubi-usersetup', 2)
2014-03-23T11:36:27.208170+00:00 utah-21391-trusty-i386 ubiquity: WARNING: Commented out your unencrypted swap from /etc/fstab
2014-03-23T11:36:27.215698+00:00 utah-21391-trusty-i386 ubiquity: INFO: Successfully setup encrypted swap!
2014-03-23T11:36:27.239588+00:00 utah-21391-trusty-i386 ubiquity: stat:
2014-03-23T11:36:27.239606+00:00 utah-21391-trusty-i386 ubiquity: cannot stat ���UUID=f9979fe9-d619-4329-9a78-db272e07d326���
2014-03-23T11:36:27.239736+00:00 utah-21391-trusty-i386 ubiquity: : No such file or directory
2014-03-23T11:36:27.239750+00:00 utah-21391-trusty-i386 ubiquity:
2014-03-23T11:36:27.239937+00:00 utah-21391-trusty-i386 ubiquity: /usr/share/ubiquity/user-setup-encrypted-swap: 84: /usr/share/ubiquity/user-setup-encrypted-swap: arithmetic expression: expecting primary: "/1048576"
2014-03-23T11:36:27.244542+00:00 utah-21391-trusty-i386 ubiquity[2502]: debconffilter_done: ubi-usersetup (current: ubi-usersetup)
2014-03-23T11:36:27.244800+00:00 utah-21391-trusty-i386 ubiquity[2502]: dbfilter_handle_status: ('ubi-usersetup', 2)