[Bug c++/124415] Brace-init of GNU vector type member rejected while other compilers accept it

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=124415

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Reduced testcase:
```

typedef float __attribute__ ((vector_size (4 * sizeof (float)))) V4;

void f(V4);

void g()
{
  f({});
}

```