if config- group_names for config- group_count g_free config- group_na

-    if( config->group_names )
-    {
-        for( i = 0; i < config->group_count; i++ )
-            g_free( config->group_names[i] );
-        g_free( config->group_names );
-    }
+    g_free( config->group_names );