mruby/mruby — pull request #972 by monaka (2013-03-09 14:12:19+00:00)
Title: Remove bit fields.

I can catch the intention in the code a little bit. But there are less merits using bit-files.
And more, It will cause undefined behavior to use bi-fields.

The targets using compile.h and/or mruby.c have probably rich RAMs.
I think there is no reason to save some bytes there.