[baobab] Ringschart: fix a warning

[Stefano Facchini <sfacchini src gnome org>]

commit a2d908245a0fcbbfd8db348bcbc6b6ac5fd5fbe7
Author: Stefano Facchini <stefano facchini gmail com>
Date:   Tue Apr 1 14:41:36 2014 +0200

    Ringschart: fix a warning

 src/baobab-ringschart.vala |    3 ++-
 1 files changed, 2 insertions(+), 1 deletions(-)
---
diff --git a/src/baobab-ringschart.vala b/src/baobab-ringschart.vala
index 45a46b8..a1502da 100644
--- a/src/baobab-ringschart.vala
+++ b/src/baobab-ringschart.vala
@@ -71,6 +71,7 @@ namespace Baobab {
             if (highlighted_item != null) {
                 tips_timeout_id = Timeout.add (SUBTIP_TIMEOUT, () => {
                     drawing_subtips = true;
+                    tips_timeout_id = 0;
                     queue_draw ();
                     return false;
                 });
@@ -412,4 +413,4 @@ namespace Baobab {
             return (max_depth > MIN_DEPTH);
         }
     }
-}
\ No newline at end of file
+}