When you change this to true, you may need to add more tests.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@53141 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
(str2big_gmp): New function.
(rb_cstr_to_inum): Use str2big_gmp for big bignums.
(rb_str2big_gmp): New function.
* internal.h (rb_str2big_gmp): Declared.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@42806 b2dd03c8-39d4-4d8f-98ff-823fe69b080e