tests/graphene-test-compat.h: Allow Build on MSVC
tests/graphene-test-compat.h: Allow Build on MSVC

Define graphene_assert_fuzzy_equals that is suitable on Visual Studio
builds, as it does not support typeof, and there are some differences in
syntax.  Later Visual Studio versions support similar functionality with
decltype.

criptych/graphene,criptych/graphene,ebassi/graphene,criptych/graphene,ebassi/graphene,criptych/graphene