* complex.c (nucomp_to_f): fix wrong message.
* complex.c (nucomp_to_r): ditto.
* object.c (rb_Float): do not check NaN for error. NaN is a part
of valid float values.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@16429 b2dd03c8-39d4-4d8f-98ff-823fe69b080e