[gtk+] Make sure to remove tooltip timeout.

[Matthias Clasen <matthiasc src gnome org>]

commit 621d1bb4ec64c0412cda8bd6f335c0e3033c00ef
Author: Olof-Joachim Frahm <olof macrolet net>
Date:   Sun Feb 5 19:08:56 2017 +0100

    Make sure to remove tooltip timeout.
    
    Otherwise in GC-ed environments the `g_source_remove` call during
    disposal might be called on an already removed source, which results in
    unnecessary console output.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=778301

 gtk/gtktooltip.c |   12 ++++++++++++
 1 files changed, 12 insertions(+), 0 deletions(-)
---
diff --git a/gtk/gtktooltip.c b/gtk/gtktooltip.c
index ea4bf31..67fc943 100644
--- a/gtk/gtktooltip.c
+++ b/gtk/gtktooltip.c
@@ -732,6 +732,12 @@ tooltip_browse_mode_expired (gpointer data)
   tooltip->browse_mode_enabled = FALSE;
   tooltip->browse_mode_timeout_id = 0;
 
+  if (tooltip->timeout_id)
+    {
+      g_source_remove (tooltip->timeout_id);
+      tooltip->timeout_id = 0;
+    }
+
   /* destroy tooltip */
   display = gtk_widget_get_display (tooltip->window);
   g_object_set_qdata (G_OBJECT (display), quark_current_tooltip, NULL);
@@ -744,6 +750,12 @@ gtk_tooltip_display_closed (GdkDisplay *display,
                            gboolean    was_error,
                            GtkTooltip *tooltip)
 {
+  if (tooltip->timeout_id)
+    {
+      g_source_remove (tooltip->timeout_id);
+      tooltip->timeout_id = 0;
+    }
+
   g_object_set_qdata (G_OBJECT (display), quark_current_tooltip, NULL);
 }