mruby/mruby — pull request #563 by xxuejie (2012-11-19 20:22:40+00:00)
Title: Fix manual implementations of erf and erfc functions

The manual implementations of erf and erfc functions provided for MSVC contain bugs. They are taken from earlier threads in the original post:

http://www.digitalmars.com/archives/cplusplus/3634.html

This commits contain fix coming from the last thread of the same post. New test cases are also added to test the behaviour.