[gnome-software] GsApp: Add some missing g_return_if_fail assertions

[Kalev Lember <klember src gnome org>]

commit 795d8a77ebd05203e4e69e946b1a438139786409
Author: Kalev Lember <kalevlember gmail com>
Date:   Sat Apr 19 19:17:29 2014 +0200

    GsApp: Add some missing g_return_if_fail assertions

 src/gs-app.c |   14 ++++++++++++++
 1 files changed, 14 insertions(+), 0 deletions(-)
---
diff --git a/src/gs-app.c b/src/gs-app.c
index 465e1c6..fa0857b 100644
--- a/src/gs-app.c
+++ b/src/gs-app.c
@@ -212,6 +212,8 @@ gs_app_to_string (GsApp *app)
        const gchar *tmp;
        guint i;
 
+       g_return_val_if_fail (GS_IS_APP (app), NULL);
+
        str = g_string_new ("GsApp:\n");
        g_string_append_printf (str, "\tkind:\t%s\n",
                                gs_app_kind_to_string (priv->kind));
@@ -542,6 +544,8 @@ gs_app_set_state_internal (GsApp *app, GsAppState state)
 void
 gs_app_set_state (GsApp *app, GsAppState state)
 {
+       g_return_if_fail (GS_IS_APP (app));
+
        if (gs_app_set_state_internal (app, state))
                gs_app_queue_notify (app, "state");
 }
@@ -693,6 +697,8 @@ gs_app_add_source (GsApp *app, const gchar *source)
        const gchar *tmp;
        guint i;
 
+       g_return_if_fail (GS_IS_APP (app));
+
        /* check source doesn't already exist */
        for (i = 0; i < app->priv->sources->len; i++) {
                tmp = g_ptr_array_index (app->priv->sources, i);
@@ -778,6 +784,8 @@ gs_app_add_source_id (GsApp *app, const gchar *source_id)
        const gchar *tmp;
        guint i;
 
+       g_return_if_fail (GS_IS_APP (app));
+
        /* only add if not already present */
        for (i = 0; i < app->priv->source_ids->len; i++) {
                tmp = g_ptr_array_index (app->priv->source_ids, i);
@@ -1656,6 +1664,9 @@ guint
 gs_app_get_kudos_percentage (GsApp *app)
 {
        guint percentage = 0;
+
+       g_return_val_if_fail (GS_IS_APP (app), 0);
+
        if ((app->priv->kudos & GS_APP_KUDO_MY_LANGUAGE) > 0)
                percentage += 20;
        if ((app->priv->kudos & GS_APP_KUDO_RECENT_RELEASE) > 0)
@@ -1705,6 +1716,9 @@ gs_app_subsume (GsApp *app, GsApp *other)
        GsAppPrivate *priv = app->priv;
        guint i;
 
+       g_return_if_fail (GS_IS_APP (app));
+       g_return_if_fail (GS_IS_APP (other));
+
        /* an [updatable] installable package is more information than
         * just the fact that something is installed */
        if (priv2->state == GS_APP_STATE_UPDATABLE &&