[Opensg-users] Rollback on one VS2013 patch

[Marcus Lindblom Sonestedt]

Hello again,

I also noticed that I had added some unnecessary reinterpret_cast-s in the
pull request a few months ago.

This concerns initMethod and exitMethod
in TemplateFieldContainerBase_cpp.txt:

&@!Classname!@::initMethod,
&@!Classname!@::exitMethod,

I assumed it was a VS2013 thing but noticed just now that the function
signature had changed instead (an arg was added), so no reinterret_cast is
necessary.

I've reverted here and it compiles just fine, so it can be done on master
too.

I suppose our initMethod's just ignored the arg on the stack, and
double-registration of enter/leave functors is not a problem.