[gtkada] Toolbar interface

[bs]

Hello

Is there a (good) reason to have different parameters type in similar 
interface.

Append_Item is not consistent with Insert_Item. The icon parameter type 
is different.

function Append_Item
     (Toolbar              : access Gtk_Toolbar_Record;
      Text                 : String := "";
      Tooltip_Text         : String := "";
      Tooltip_Private_Text : String := "";
      Icon                 : Gtk.Widget.Gtk_Widget := null)
      return Gtk.Button.Gtk_Button;

   function Insert_Item
     (Toolbar              : access Gtk_Toolbar_Record;
      Text                 : String := "";
      Tooltip_Text         : String := "";
      Tooltip_Private_Text : String := "";
      Icon                 : access Gtk.Widget.Gtk_Widget_Record'Class;
      Position             : Gint)
      return Gtk.Button.Gtk_Button;

The same occurs for Append_Element....

Thanks