Work around for a numpy bug triggered by scons and the import of Scientific.Visualization.VMD.
For details, see the thread started by Jack Howarth (howarth att bromo dot med dot uc dot edu)
started at http://thread.gmane.org/gmane.science.nmr.relax.devel/3663 (Message ID:
<20121019140023.GA26861@...>).
