pylab import fails with numarray in CVS

Running python -c "import pylab" fails if numarray is specified
in .matplotlibrc. Failure is due to attempting to import
numerix.average which is only present using the Numeric backend.

This turned out to be useful for me as it made me realise I'd forgotten
to change back to Numeric after trying out numarray for a task - but for
others it's probably less useful.


Nicholas Young