"extern" and "[]" of the module Importable returns a symbol.

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2340 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ext/dl/lib/dl/import.rb

@@ -20,6 +20,10 @@ module DL
 	end
       end
 
+      def [](name)
+	return @SYM[name.to_s][0]
+      end
+
       def dlload(*libnames)
 	if( !defined?(@LIBS) )
 	  @LIBS = []
@@ -107,7 +111,7 @@ module DL
 	    "module_function :#{mname}",
 	  ].join("\n")
 
-	  return @SYM[mname]
+	  return sym
 	}
 	raise(RuntimeError, "can't find #{name}.")
       end