* ext/dl/lib/dl/value.rb (DL::ValueUtil#wrap_arg): NULL for nil.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@22718 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,4 +1,6 @@
-Tue Mar  3 15:03:19 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+Tue Mar  3 15:05:19 2009  Nobuyoshi Nakada  <nobu@ruby-lang.org>
+
+	* ext/dl/lib/dl/value.rb (DL::ValueUtil#wrap_arg): NULL for nil.
 
 	* test/dl: moved from ext/dl/test.
 

ext/dl/lib/dl/value.rb

@@ -48,6 +48,8 @@ module DL
     def wrap_arg(arg, ty, funcs, &block)
         funcs ||= []
         case arg
+        when nil
+          return 0
         when CPtr
           return arg.to_i
         when IO