fix warnings in gtksalframe

g_simple_action_group_add_entries was deprecated in GLib 2.38

Change-Id: I727e8aeeecd66b8f071d43ff56d9dc94cda1b9e0

vcl/unx/gtk/window/gtksalframe.cxx

@@ -722,7 +722,11 @@ gboolean ensure_dbus_setup( gpointer data )
             g_object_unref(thirdsubmenu);
 
             GSimpleActionGroup *group = g_simple_action_group_new ();
+#if GLIB_CHECK_VERSION(2,38,0) // g_simple_action_group_add_entries is deprecated since 2.38
+            g_action_map_add_action_entries (G_ACTION_MAP (group), app_entries, G_N_ELEMENTS (app_entries), NULL);
+#else
             g_simple_action_group_add_entries (group, app_entries, G_N_ELEMENTS (app_entries), NULL);
+#endif
             GActionGroup* pAppActionGroup = G_ACTION_GROUP(group);
 
             pSalFrame->m_nAppActionGroupExportId = g_dbus_connection_export_action_group( pSessionBus, "/org/libreoffice", pAppActionGroup, NULL);
@@ -3575,7 +3579,8 @@ gboolean GtkSalFrame::signalMap( GtkWidget *pWidget, GdkEvent*, gpointer frame )
                 {
                     sFinalProgram += "--display " + sDisplay;
                 }
-                system(sFinalProgram.getStr());
+                int returnValue = system(sFinalProgram.getStr());
+                (void)returnValue;
             }
         }
     }