[gedit] Check if the error tag was created if not we will get false positives.

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 9b07cf6a4e4fcdf35f9a3006f2b3dc553b7a6930
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Tue Feb 1 16:31:12 2011 +0100

    Check if the error tag was created if not we will get false positives.

 gedit/gedit-document.c |    5 +++++
 1 files changed, 5 insertions(+), 0 deletions(-)
---
diff --git a/gedit/gedit-document.c b/gedit/gedit-document.c
index ae2783c..2b8d788 100644
--- a/gedit/gedit-document.c
+++ b/gedit/gedit-document.c
@@ -1716,6 +1716,11 @@ has_invalid_chars (GeditDocument *doc)
 
 	gedit_debug (DEBUG_DOCUMENT);
 
+	if (doc->priv->error_tag == NULL)
+	{
+		return FALSE;
+	}
+
 	buffer = GTK_TEXT_BUFFER (doc);
 
 	gtk_text_buffer_get_start_iter (buffer, &start);