[Hampshire] scanf conversion - anyone know what "%m" is?

Hi All.

I've just raised a bug against a RH package because it uses the %m format
conversion, which doesn't exist according to everything I've found. The
response I got is that it's a poorly-documented extension...

Leaving aside the fact that poorly-documented extensions have no place in
code like this, does anyone know what it's supposed to do? I can't find a
single reference to %m...

Vic.