* enum.c (first_i): Enumerator#first should consume only what is
	  needed.   a patch from Marc-Andre Lafortune.  [ruby-core:23661]
	* enum.c (take_i): ditto.
	* enum.c (enum_first): call to_int once for an argument.  a patch
	  from Marc-Andre Lafortune.


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8_7@24272 b2dd03c8-39d4-4d8f-98ff-823fe69b080e