[sigc] Fixing lambda bugs

[kenelson8 comcast net]

Hello all,

I see there are some outstanding bugs in the lambda section.  I think that I 
can fix some of them along with some of the FIXME sections, however, I 
am concerned with the level of changes that may be required.  Is anyone
using the lambda?  Also is anyone connecting into the internal classes which
will likely get broken by a big change?

--Karl