Some build-fixes for pedantic compilers.

Some build-fixes for pedantic compilers.

Most of the change comes down to just one issue. If you write:

extern "C" { void something(); }
namespace Nowhere { extern "C" { void something() {} } }

.. then any use of something might be considered ambigous by some
compilers. This seems to be an edge-case that is not clear in the spec.

Change-Id: I90e32539d6bd35b6ecca7816349f18d7573cbd2f
Reviewed-by: Lars Knoll <lars.knoll@digia.com>