mruby/mruby — pull request #2660 by cremno (2014-12-01 23:46:32+00:00)
Title: fix ISBLANK() for Visual Studio < 2013

Visual Studio versions older than 2013 lack C99's `isblank()`. Since only ASCII characters are passed to it, implement it directly without calling the locale-specific `isblank()`.

(Really) fixes #2658:
>Another problem is that the compiler didn't find "isblank".