[Tile-serving] [osm2pgsql] Fixes to restore MSVC compatibilty (#440)

[alex85k]

Recompilng on Visual Studio 2015 on Windows 10 x64 resulted in several errors.
Most of them were from my cmake scripts (now fixed), but two problematic places were found in the code.
You can view, comment on, or merge this pull request online at:

  https://github.com/openstreetmap/osm2pgsql/pull/440

-- Commit Summary --

  * #include<iterator> for std::inserter
  * constexpr was too complex for MSVC

-- File Changes --

    M middle-ram.hpp (2)
    M tests/test-expire-tiles.cpp (1)

-- Patch Links --

https://github.com/openstreetmap/osm2pgsql/pull/440.patch
https://github.com/openstreetmap/osm2pgsql/pull/440.diff

---
Reply to this email directly or view it on GitHub:
https://github.com/openstreetmap/osm2pgsql/pull/440
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