* gc.c (get_envparam_int): don't accept a value equals to lowerbound
  (changed by last commit) because "" or "foo" (not a number) strings
  are parsed as 0. They should be rejected.
* gc.c (get_envparam_double): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44861 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
* gc.c (get_envparam_int): correct warning messsages.
* gc.c (get_envparam_double): ditto.



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@44862 b2dd03c8-39d4-4d8f-98ff-823fe69b080e