* numeric.c (flo_divmod): Revert the behavior change; do not
	  suppress an exception when div is NaN or Inf. [ruby-dev:34857]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_6@17339 b2dd03c8-39d4-4d8f-98ff-823fe69b080e