Bug#672391: Please consider chaging dependency of libsigc++1.2 to 2.0

[Dmitrijs Ledkovs]

Hello,

> I would like to ask you to consider changing the build-depends from
> libsigc++-1.2-dev to libsigc++-2.0-dev.
> 

Can you please provide a patch?

Simply changing the build dependency results in FTBFS.
Changes are needed to configure.in
They should be fairly minimal, I got a few warnings/errors from autoconf
so regenerating autofoo would be nice.

-- 
Regards,
Dmitrijs.