Re: [C++ Patch] Fix c++/56243

[Jason Merrill]

I think my preference would be to avoid calling fixed_type_or_null at 
all when we're in a template.  I already changed 
resolves_to_fixed_type_p that way, now we need to fix build_vtbl_ref_1. 
 For post 4.8 we might avoid messing with vtables at all when we're in 
a template.

Jason