Fix -{config.name} command-line processing.

--HG--
extra : rebase_source : 452d953121c4b28ea1585842710e0c74b4bef348

vimperator/components/commandline-handler.js

@@ -35,7 +35,7 @@ CommandLineHandler.prototype = {
             this.optionValue = commandLine.handleFlagWithParam(name, false);
         }
         catch (e) {
-            //"vimperator: option -vimperator requires an argument"
+            dump(name + ": option '-" + name + "' requires an argument\n");
         }
     }
 };