Reviewed by Nikolas Zimmermann.

        gtk2drawing: fix compiler warnings

        g_object_set_data expects a gpointer as the last argument. Cast the
          TRUE/FALSE values to avoid a warning.
        gtk_tree_view_column_new doesn't return a GtkWidget.

        * platform/gtk/gtk2drawing.c:
        (setup_widget_prototype):
        (moz_gtk_get_combo_box_inner_button):
        (moz_gtk_get_combo_box_button_inner_widgets):
        (ensure_combo_box_widgets):
        (moz_gtk_get_combo_box_entry_inner_widgets):
        (moz_gtk_get_combo_box_entry_arrow):
        (ensure_combo_box_entry_widgets):
        (ensure_toolbar_widget):
        (ensure_menu_bar_item_widget):
        (ensure_menu_popup_widget):
        (ensure_menu_item_widget):
        (ensure_image_menu_item_widget):
        (ensure_menu_separator_widget):
        (ensure_check_menu_item_widget):
        (ensure_tree_header_cell_widget):
        (moz_gtk_entry_paint):



git-svn-id: http://svn.webkit.org/repository/webkit/trunk@40255 268f45cc-cd09-0410-ab3c-d52691b4dbfc