[nautilus] search-directory: fix missing ref to the query

[Carlos Soriano Sánchez <csoriano src gnome org>]

commit 66c17fa53d0afe1adfcc976d4d5ba52a6c3dc3f3
Author: Carlos Soriano <csoriano gnome org>
Date:   Thu Apr 14 14:23:46 2016 +0200

    search-directory: fix missing ref to the query

 libnautilus-private/nautilus-search-directory.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/libnautilus-private/nautilus-search-directory.c b/libnautilus-private/nautilus-search-directory.c
index ed03ec0..559c531 100644
--- a/libnautilus-private/nautilus-search-directory.c
+++ b/libnautilus-private/nautilus-search-directory.c
@@ -956,7 +956,7 @@ nautilus_search_directory_set_query (NautilusSearchDirectory *search,
         old_query = search->details->query;
 
        if (search->details->query != query) {
-               search->details->query = query;
+               search->details->query = g_object_ref (query);
 
                g_clear_pointer (&search->details->binding, g_binding_unbind);