[sigc] Deprecate retype() and retype_return() ?

[Murray Cumming <murrayc murrayc com>]

I am tempted to deprecate retype() and retype_return() because they
don't seem widely useful and this would let us remove them one day,
simplifying the code further. Or does anybody really use and love them?

http://libsigc.sourceforge.net/libsigc2/docs/reference/html/group__rety
pe.html#_details

-- 
Murray Cumming
murrayc murrayc com
www.murrayc.com