[l2h] Unavailable packages

[William Waite]

I get the following message at the end of a log:

Copying navigation icons ...
 *** Adding document-specific styles ***

*********** WARNINGS ***********
No implementation found for style `algorithmic'
No implementation found for style `a4wide'

Unknown commands: bullet ;
Done.

I'm not particularly concerned about a4wide at the moment, but algorithmic
is needed for a couple of figures.

The bullet command appears to be coming out of some macro -- I haven't been
able to find out whether its absence has caused any problems.