Correct use of Py_BUILD_CORE - now make sure it is defined before it is referenced, and also fix definition of _WIN32_WINNT. Resolves patch 1761803.
Correct use of Py_BUILD_CORE - now make sure it is defined before it is
referenced, and also fix definition of _WIN32_WINNT.
Resolves patch 1761803.

sk-/python2.7-type-annotator,sk-/python2.7-type-annotator,sk-/python2.7-type-annotator