[nautilus] Don't crash when hiding search bar with no text

[Tomas Bzatek <tbzatek src gnome org>]

commit a92a7bfcb2c7bb9f171724bc97b1c163f52c0fd7
Author: Tomas Bzatek <tbzatek redhat com>
Date:   Wed Mar 24 17:00:21 2010 +0100

    Don't crash when hiding search bar with no text
    
    Happens in browser mode and only when search results pane is displayed

 src/nautilus-navigation-window-menus.c |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/src/nautilus-navigation-window-menus.c b/src/nautilus-navigation-window-menus.c
index 5bddd5e..7aab617 100644
--- a/src/nautilus-navigation-window-menus.c
+++ b/src/nautilus-navigation-window-menus.c
@@ -698,10 +698,12 @@ action_show_hide_search_callback (GtkAction *action,
 			char *uri;
 
 			query = nautilus_query_editor_get_query (slot->query_editor);
-			uri = nautilus_query_get_location (query);
-			if (uri != NULL) {
-				location = g_file_new_for_uri (uri);
-				g_free (uri);
+			if (query != NULL) {
+				uri = nautilus_query_get_location (query);
+				if (uri != NULL) {
+					location = g_file_new_for_uri (uri);
+					g_free (uri);
+				}
 			}
 		}