[gtk+] inspector: Avoid criticals in the css editro

[Matthias Clasen <matthiasc src gnome org>]

commit 6a67df79a8f40c488f9098170109eacba45ec2cc
Author: Matthias Clasen <mclasen redhat com>
Date:   Sun Dec 20 14:40:49 2015 -0500

    inspector: Avoid criticals in the css editro
    
    We can't keep text iters around after text buffer has been
    changed. Just clear the list errors when the buffer changes
    before we've passed it again.

 gtk/inspector/css-editor.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)
---
diff --git a/gtk/inspector/css-editor.c b/gtk/inspector/css-editor.c
index d554784..bdfe762 100644
--- a/gtk/inspector/css-editor.c
+++ b/gtk/inspector/css-editor.c
@@ -308,6 +308,9 @@ text_changed (GtkTextBuffer         *buffer,
     g_source_remove (ce->priv->timeout);
 
   ce->priv->timeout = g_timeout_add (100, update_timeout, ce); 
+
+  g_list_free_full (ce->priv->errors, css_error_free);
+  ce->priv->errors = NULL;
 }
 
 static void