[gimp] app: fix tooltip of propgui color buttons

[N/A <ell src gnome org>]

commit 7e1fd5983cb29a76041d2b0522d2e045708d941b
Author: Ell <ell_se yahoo com>
Date:   Thu Mar 8 15:22:31 2018 -0500

    app: fix tooltip of propgui color buttons
    
    Source/target arguments of bind_tooltip() were swapped.

 app/propgui/gimppropgui.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/propgui/gimppropgui.c b/app/propgui/gimppropgui.c
index e10102d..1369779 100644
--- a/app/propgui/gimppropgui.c
+++ b/app/propgui/gimppropgui.c
@@ -365,7 +365,7 @@ gimp_prop_widget_new_from_pspec (GObject                  *config,
       gtk_box_pack_start (GTK_BOX (widget), button, TRUE, TRUE, 0);
       gtk_widget_show (button);
 
-      gimp_prop_gui_bind_tooltip (widget, button);
+      gimp_prop_gui_bind_tooltip (button, widget);
 
       if (create_picker_func)
         {