_PyLong_Sign(): remove an assert that needed a variable ndigits that wasn't used outside the assert (and hence caused a compiler warning about an unused variable in NDEBUG mode).  The assert wasn't very useful any more.
_PyLong_Sign(): remove an assert that needed a variable ndigits that
wasn't used outside the assert (and hence caused a compiler warning
about an unused variable in NDEBUG mode).  The assert wasn't very
useful any more.

_PyLong_NumBits(): moved the calculation of ndigits after asserting
that v != NULL.

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