bugfix for matplotlib/ticker.py (python 3.3)#1991

Merged

mdboom merged 1 commit intomatplotlib:v1.2.xfrom

mdboom:ticker-overflow

May 10, 2013

Commits on May 10, 2013

Fix #1991 and #1828. Integer overlow on Python 3 causes a crash. Adds a test.
mdboom
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