Description of changes:
- declare types
size_t
andptrdiff_t
as aliases ofstd::size_t
resp.std::ptrdiff_t
insrc/core/DataTypes.h
- in files that don't directly or indirectly include
src/core/DataTypes.h
, use the namespaced versions of these types - add missing
<cstddef>
includes
Fixes #157 (closed)