merge revision(s) 35081: [Backport #6605]
* bignum.c (rb_big_pow): estimate result bit size more precisely. [ruby-core:30735][Feature #3429]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@36226 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
merge revision(s) 35081: [Backport #6605]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_3@36226 b2dd03c8-39d4-4d8f-98ff-823fe69b080e