[EMBOSS] Building EMBOSS error

[ajb at ebi.ac.uk]

> When I run the configure script I get:
>
> checking for purify... no
> expr: syntax error
> ./configure: test: =: unary operator expected
> checking if any threading type is given... No
>
> I'm still able to build fine but wasn't sure if this error might cause
> some problems...

That is a message which can be safely ignored. I do need to tidy that up
though - thanks for the reminder.

Alan