* Applied a small fix to a bug reported by Guignot:

When a script that used setAttr for Camera Data objs (the bug also
    affected some other modules) was executed multiple times, Blender
    would crash after, let's say, the first 5 or 6 tries.  Problem, as
    Guignot pointed, was with reference counting.  Should be ok now, all
    affected modules were fixed.
* The Scene module is now "complete" (= 2.25).
* Made some necessary updates to Object and NMesh.

source/blender/python/api2_2x/Metaball.c

@@ -1008,7 +1008,7 @@ if (strcmp (name, "rot") == 0)return  Metaball_getrot (self);
 /*******************************************************************************/
 static int MetaballSetAttr (C_Metaball *self, char *name, PyObject *value)
 {
-  PyObject *valtuple  = Py_BuildValue("(N)", value);
+  PyObject *valtuple  = Py_BuildValue("(O)", value);
 
   if (!valtuple) 
     return EXPP_ReturnIntError(PyExc_MemoryError,