[Tile-serving] [mod_tile] CORS support sends bogus Access-Control-Allow-Headers header (#39)

[Tom Hughes]

If the request does not have a `Access-Control-Request-Headers` header then the response will include:

```
Access-Control-Allow-Headers: (null)
```

because it has tried to format a null pointer into the response.

---
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/mod_tile/issues/39
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