[gnome-software] Only set the management plugin on an app if it differs

[Joaquim Manuel Pereira Rocha <jrocha src gnome org>]

commit b8e42e5b268b19ecdfcaedb226dd1eaff38ed014
Author: Joaquim Rocha <jrocha endlessm com>
Date:   Tue Jun 14 13:53:33 2016 +0200

    Only set the management plugin on an app if it differs
    
    This skips freeing+allocating new memory for storing the same content.

 src/gs-app.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/gs-app.c b/src/gs-app.c
index 3a3e0e6..d59547a 100644
--- a/src/gs-app.c
+++ b/src/gs-app.c
@@ -1855,6 +1855,10 @@ void
 gs_app_set_management_plugin (GsApp *app, const gchar *management_plugin)
 {
        g_return_if_fail (GS_IS_APP (app));
+
+       if (g_strcmp0 (app->management_plugin, management_plugin) == 0)
+               return;
+
        g_free (app->management_plugin);
        app->management_plugin = g_strdup (management_plugin);
 }