[Tile-serving] [osm2pgsql] add missing include for std::cerr (#469)

[Sarah Hoffmann]

Merged #469.

---
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/pull/469#event-442992618
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://lists.openstreetmap.org/pipermail/tile-serving/attachments/20151022/a41257ed/attachment.html>