[gnome-software] shell search provider: Minor cleanup for dispose

[Kalev Lember <klember src gnome org>]

commit a9f78a9c030b3f5f7b34b99cb2a44cf37d1d0924
Author: Kalev Lember <kalevlember gmail com>
Date:   Sun Jun 7 15:43:56 2015 +0200

    shell search provider: Minor cleanup for dispose
    
    Avoid clearing the cancellable object twice and add a guard make sure
    that g_hash_table_destroy() isn't called twice.

 src/gs-shell-search-provider.c |    7 +++++--
 1 files changed, 5 insertions(+), 2 deletions(-)
---
diff --git a/src/gs-shell-search-provider.c b/src/gs-shell-search-provider.c
index 109c690..675dfb2 100644
--- a/src/gs-shell-search-provider.c
+++ b/src/gs-shell-search-provider.c
@@ -329,10 +329,13 @@ search_provider_dispose (GObject *obj)
                g_clear_object (&self->cancellable);
        }
 
+       if (self->metas_cache != NULL) {
+               g_hash_table_destroy (self->metas_cache);
+               self->metas_cache = NULL;
+       }
+
        g_clear_object (&self->object_manager);
        g_clear_object (&self->plugin_loader);
-       g_clear_object (&self->cancellable);
-       g_hash_table_destroy (self->metas_cache);
        g_application_release (g_application_get_default ());
 
        G_OBJECT_CLASS (gs_shell_search_provider_parent_class)->dispose (obj);