[gnome-software] Only call the GsPage installed and removed vfuncs of the app changed state

[Richard Hughes <rhughes src gnome org>]

commit 3ae0bef8df738af320655efc8d167e244989ff40
Author: Richard Hughes <richard hughsie com>
Date:   Wed Nov 23 14:13:39 2016 +0000

    Only call the GsPage installed and removed vfuncs of the app changed state

 src/gs-page.c |    8 ++++++--
 1 files changed, 6 insertions(+), 2 deletions(-)
---
diff --git a/src/gs-page.c b/src/gs-page.c
index d0c7b27..5c21b0a 100644
--- a/src/gs-page.c
+++ b/src/gs-page.c
@@ -178,8 +178,10 @@ gs_page_app_installed_cb (GObject *source,
            !gs_shell_is_active (priv->shell))
                gs_app_notify_installed (helper->app);
 
-       if (GS_PAGE_GET_CLASS (page)->app_installed != NULL)
+       if (gs_app_is_installed (helper->app) &&
+           GS_PAGE_GET_CLASS (page)->app_installed != NULL) {
                GS_PAGE_GET_CLASS (page)->app_installed (page, helper->app);
+       }
 }
 
 static void
@@ -229,8 +231,10 @@ gs_page_app_removed_cb (GObject *source,
                return;
        }
 
-       if (GS_PAGE_GET_CLASS (page)->app_removed != NULL)
+       if (!gs_app_is_installed (helper->app) &&
+           GS_PAGE_GET_CLASS (page)->app_removed != NULL) {
                GS_PAGE_GET_CLASS (page)->app_removed (page, helper->app);
+       }
 }
 
 GtkWidget *