[mutter] Don't use deprecated GtkTooltips type unnecessarily

[Claudio Saavedra <csaavedra src gnome org>]

commit 7a04673dd743e7ca90d5ca02608b14322a62e2e5
Author: Claudio Saavedra <csaavedra igalia com>
Date:   Sat Jun 26 18:11:01 2010 +0300

    Don't use deprecated GtkTooltips type unnecessarily
    
    Bug 622800.

 src/ui/fixedtip.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/ui/fixedtip.c b/src/ui/fixedtip.c
index de2a4bb..bb536df 100644
--- a/src/ui/fixedtip.c
+++ b/src/ui/fixedtip.c
@@ -51,7 +51,7 @@ static int screen_right_edge = 0;
 static int screen_bottom_edge = 0;
 
 static gint
-expose_handler (GtkTooltips *tooltips)
+expose_handler (GtkWidget *tooltips)
 {
   gtk_paint_flat_box (gtk_widget_get_style (tip),
                       gtk_widget_get_window (tip),