ifdef's for future py3 support, after this adding py3 can mostly be done with defines or batch renaming funcs (with the exception of CListValue slicing)

.
No changes for py2.x.

source/gameengine/GameLogic/SCA_ISensor.cpp

@@ -393,8 +393,13 @@ KX_PYMETHODDEF_DOC_NOARGS(SCA_ISensor, reset,
 /* ----------------------------------------------- */
 
 PyTypeObject SCA_ISensor::Type = {
-	PyObject_HEAD_INIT(NULL)
-	0,
+#if (PY_VERSION_HEX >= 0x02060000)
+	PyVarObject_HEAD_INIT(NULL, 0)
+#else
+	/* python 2.5 and below */
+	PyObject_HEAD_INIT( NULL )  /* required py macro */
+	0,                          /* ob_size */
+#endif
 	"SCA_ISensor",
 	sizeof(PyObjectPlus_Proxy),
 	0,