[gnome-software/gnome-3-10] Avoid adding pending apps more than once to the installed list

[Matthias Clasen <matthiasc src gnome org>]

commit 34b97f2a9f736dbb19bce20965f24774b64e635d
Author: Matthias Clasen <mclasen redhat com>
Date:   Mon Nov 25 21:52:46 2013 -0500

    Avoid adding pending apps more than once to the installed list
    
    This is a backport of an existing fix on master.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=711613

 src/gs-shell-installed.c |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/src/gs-shell-installed.c b/src/gs-shell-installed.c
index 2073ecb..c3ad54f 100644
--- a/src/gs-shell-installed.c
+++ b/src/gs-shell-installed.c
@@ -416,8 +416,10 @@ gs_shell_installed_pending_apps_changed_cb (GsPluginLoader *plugin_loader,
                        /* sort installing apps above removing and
                         * installed apps
                         */
-                       gs_app_set_install_date (app, G_MAXUINT - 1);
-                       gs_shell_installed_add_app (shell_installed, app);
+                       if (gs_app_get_install_date (app) != G_MAXUINT - 1) {
+                               gs_app_set_install_date (app, G_MAXUINT - 1);
+                               gs_shell_installed_add_app (shell_installed, app);
+                       }
                }
        }