* 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/Material.c

@@ -1254,8 +1254,8 @@ static int Material_SetAttr (C_Material *self, char *name, PyObject *value)
  * interval and updates the Blender Material structure when necessary. */
 
 /* First we put "value" in a tuple, because we want to pass it to functions
- * that only accept PyTuples. Using "N" doesn't increment value's ref count */
-  valtuple = Py_BuildValue("(N)", value);
+ * that only accept PyTuples. */
+  valtuple = Py_BuildValue("(O)", value);
 
   if (!valtuple) /* everything OK with our PyObject? */
     return EXPP_ReturnIntError(PyExc_MemoryError,