[MERGE][Bug #196618] Change some assertions to exceptions in LP plugin

[John Arbash Meinel]

-----BEGIN PGP SIGNED MESSAGE-----
Hash: SHA1

Daniel Mark Watkins wrote:
> Attached is a patch which changes the assertion that was the issue in
> bug #196618[0] to raise an exception so the user gets a prettier error
> message.  There was another obvious assertion which got drive-by
> treatment.
> 
> 
> Dan
> 
> [Footnote 0: https://bugs.launchpad.net/bzr/+bug/196618]
> 

BB:approve

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v1.4.6 (GNU/Linux)
Comment: Using GnuPG with Mozilla - http://enigmail.mozdev.org

iD8DBQFHzDhZJdeBCYSNAAMRAsDUAJ9dR34UwuxXd7TlBo0XCVZY9Is4cACeIreQ
xQ8uJffTNVaPJWWV4R6wcv4=
=8ahb
-----END PGP SIGNATURE-----