Fixed so that it builds with VS2013. VLA:s are not supported, because of its strict C89 world view.
Merge pull request #1587 from perlun/patch-1

Fixed so that it builds with VS2013. VLA:s are not supported, because of its strict C89 world view.
parser_dump() is not used in mrbc; close #1561
Merge branch 'master' of github.com:mruby/mruby
irep->pool struct pool -> mrb_value
resolve conflict
mrb format should be portable among configurations (e.g. MRB_NAN_BOXING)
need to free pooled string bodies as well
rename API mrb_str_dup_static() -> mrb_str_pool()
declare struct mrb_irep.
Merge pull request #1590 from iij/pr-declare-struct-mrb-irep

declare struct mrb_irep.