#156 Change MAPI GetLastError()

[Nick Czeczulin]

This patch should remove the need for the typemap fix in [#154] entirely. The patch however unfortunately repeats the same ~20 line change in each of the interface class implementations. With this change, passing the MAPI_UNICODE flag has an effect on both the requested and returned values.

An additional function PyWinObject_FromMAPIStr() is introduced to ensure the returned strings are coerced to the expected type:

• For Python 3, this always means unicode. i.e., if MAPI_UNICODE was not passed, PyUnicode_DecodeMBCS() is called.
• For Python 2, if MAPI_UNICODE was not passed, PyString_FromString() is called.

Additionally, PyObject_FromMAPIERROR() has been changed to simply call PyWinObject_FromMAPIStr()

[Mark Hammond]

4389:e32aa302e540