Missing import in matplotlib-1.3.1 setupext.py

Hi,

I think there is an

import warnings

statement missing in the setupext.py file in the matplotlib-1.3.1 source
package. Adding the missing import made the installation from source
work for me.

Maybe someone can doublecheck that.

Best,

Benjamin

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Benjamin Trendelkamp-Schroer
Freie Universit�t Berlin
FB Mathematik + Informatik
Institut f�r Mathematik
Arnimallee 6
D-14195 Berlin-Dahlem
trendelkamp@...4370...
+49-(0)30-838-75364