py api cleanup, replace use...

- PyLong_FromSsize_t --> PyLong_FromLong
- PyLong_AsSsize_t --> PyLong_AsLong

In all places except for those where python api expects PySsize_t (index lookups mainly).

- use PyBool_FromLong in a few areas of the BGE.
- fix incorrect assumption in the BGE that PySequence_Check() means PySequence_Fast_ functions can be used.

source/gameengine/Ketsji/KX_ConstraintWrapper.cpp

@@ -52,7 +52,7 @@ KX_ConstraintWrapper::~KX_ConstraintWrapper()
 
 PyObject *KX_ConstraintWrapper::PyGetConstraintId()
 {
-	return PyLong_FromSsize_t(m_constraintId);
+	return PyLong_FromLong(m_constraintId);
 }