highslide-software/highcharts.com — pull request #2133 by dustyjewett (2013-08-13 04:00:53+00:00)
Title: Fixing infinite loop caused by pie chart having only null or zero values

Fixes #2131.
Adding a default label position when none may be defined. Added comments, an extra check for valid values, and pulled apart some complicated statements in order to provide better readability / comprehension.

PR from @simplymeasured