should compare SIZEOF_VOIDP with SIZEOF_LONG_LONG.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@9518 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/dl/lib/dl/stack.rb

@@ -22,7 +22,7 @@ module DL
       case SIZEOF_VOIDP
       when SIZEOF_LONG
         ary.pack(@template).unpack('l!*')
-      when SIZEOF_LONG
+      when SIZEOF_LONG_LONG
         ary.pack(@template).unpack('q*')
       else
         raise(RuntimeError, "sizeof(void*)?")