[sysprof/wip/visualizers] callgraph-view: clear models when unloading

[Christian Hergert <chergert src gnome org>]

commit 37edc29cbbeec75ea001d87f427283ec406a1c10
Author: Christian Hergert <chergert redhat com>
Date:   Sat Oct 8 19:20:30 2016 -0700

    callgraph-view: clear models when unloading

 lib/sp-callgraph-view.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/lib/sp-callgraph-view.c b/lib/sp-callgraph-view.c
index 3379136..d049e4c 100644
--- a/lib/sp-callgraph-view.c
+++ b/lib/sp-callgraph-view.c
@@ -211,6 +211,10 @@ sp_callgraph_view_unload (SpCallgraphView *self)
   g_queue_clear (priv->history);
   g_clear_object (&priv->profile);
   priv->profile_size = 0;
+
+  gtk_tree_view_set_model (priv->callers_view, NULL);
+  gtk_tree_view_set_model (priv->functions_view, NULL);
+  gtk_tree_view_set_model (priv->descendants_view, NULL);
 }
 
 void