[lmi] still MSVC compilation problems

[Vadim Zeitlin]

 Hello (Greg),

 I'm about ready to just accept the defeat in my struggle to make LMI code
compilable with MSVC. I spent quite a lot of time on this already but
unfortunately it seems that there is just something fundamentally wrong in
(all versions, including 2008 one, of) the compiler which prevents it from
compiling the code in any_member.hpp. More precisely, it's the
any_member<ClassType>::exact_cast() function which can't be compiled
because it insists on fully instantiating holder<ClassType,pmd_type> (even
though normally MSVC 7+ does understand the concept of SFINAE).

 Would you have any ideas about how could this code possibly be changed to
accommodate this compiler? I'm afraid I ran out of ideas...

 TIA,
VZ