Put the GRAPHENE_VECTORCALL annotation on its own line
Put the GRAPHENE_VECTORCALL annotation on its own line

This makes gtk-doc happy, and find the graphene_simd4x4f_init() symbol.
Hopefully, it won't break MSVC compilation.

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