[gnome-software] trivial: Add some critical checks for gs_plugin_download_file()

[Richard Hughes <rhughes src gnome org>]

commit 0992776d0e5ac81c3f8eb0daca1f4dfb07c735ca
Author: Richard Hughes <richard hughsie com>
Date:   Thu Dec 1 20:15:15 2016 +0000

    trivial: Add some critical checks for gs_plugin_download_file()

 src/gs-plugin.c |    9 +++++++++
 1 files changed, 9 insertions(+), 0 deletions(-)
---
diff --git a/src/gs-plugin.c b/src/gs-plugin.c
index 7d67a04..f154c82 100644
--- a/src/gs-plugin.c
+++ b/src/gs-plugin.c
@@ -1091,6 +1091,10 @@ gs_plugin_download_data (GsPlugin *plugin,
        guint status_code;
        g_autoptr(SoupMessage) msg = NULL;
 
+       g_return_val_if_fail (GS_IS_PLUGIN (plugin), NULL);
+       g_return_val_if_fail (uri != NULL, NULL);
+       g_return_val_if_fail (error == NULL || *error == NULL, NULL);
+
        g_debug ("downloading %s from plugin %s", uri, priv->name);
        msg = soup_message_new (SOUP_METHOD_GET, uri);
        if (app != NULL) {
@@ -1149,6 +1153,11 @@ gs_plugin_download_file (GsPlugin *plugin,
        g_autoptr(GError) error_local = NULL;
        g_autoptr(SoupMessage) msg = NULL;
 
+       g_return_val_if_fail (GS_IS_PLUGIN (plugin), FALSE);
+       g_return_val_if_fail (uri != NULL, FALSE);
+       g_return_val_if_fail (filename != NULL, FALSE);
+       g_return_val_if_fail (error == NULL || *error == NULL, FALSE);
+
        g_debug ("downloading %s to %s from plugin %s", uri, filename, priv->name);
        msg = soup_message_new (SOUP_METHOD_GET, uri);
        if (app != NULL) {