[Bf-python] sitedirs and Python 2.4

[Ken Hughes]

I was looking at a bug report 
(https://projects.blender.org/tracker/index.php?func=detail&aid=3281&group_id=9&atid=125) 
which is the second I've seen on the subject of site-packages no longer 
being included in the path.  I looked into it and apparently Python 2.4 
no longer contains the "sitedirs" list.

I made a patch to init_syspath() which basicially checks for failure 
when getting "sitedirs" from the site module's dict which does:

     mod = PyImport_ReloadModule( mod );
     if( mod )
         Py_DECREF( mod );
     else {
         PyErr_Clear(  );
         printf ("site-packages could not be added.\n);
     }

This basically causes main() in site.py to execute, calculating the 
site-packages paths along with some other things.

My question: does this seem OK or am I overlooking something?

Ken