[anjuta] document-manager: Fix a critical warning when using search box

[Sebastien Granjoux <sgranjoux src gnome org>]

commit bce92e7474e21b508cf366ea1af77e60e9ee7eee
Author: SÃbastien Granjoux <seb sfo free fr>
Date:   Sat Sep 17 21:48:32 2011 +0200

    document-manager: Fix a critical warning when using search box

 plugins/document-manager/search-box.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/plugins/document-manager/search-box.c b/plugins/document-manager/search-box.c
index 406d50e..d1f6a7c 100644
--- a/plugins/document-manager/search-box.c
+++ b/plugins/document-manager/search-box.c
@@ -707,6 +707,7 @@ search_box_search_highlight_all (SearchBox * search_box, gboolean search_forward
 			g_object_unref (result_begin);
 			g_object_unref (result_end);
 			g_object_unref (highlight_start);
+			highlight_start = NULL;
 			break;
 		}