extern(C) on var decl is confusing

[user1234 via Digitalmars-d-learn]

That is confusing, e.g

```
extern(C) int r;

int main()
{
    return r;
}
```

works. But what is likely more intended here is

```
extern int r;

int main()
{
    return r;
}
```

which leads, this time, to the expected linker error.