[Issue 24306] ImportC: same name structs in separate C files interfere when compiled together

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24306

--- Comment #1 from Dennis <dkorpel at live.nl> ---
Forgot to copy the semi-colon:

```b.c
struct S {};
```

I'm used to D after all :)

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