[gnome-software] trivial: Do not re-download the remote icon every time it's requested

[Richard Hughes <rhughes src gnome org>]

commit 639f507db6aba385013cdbb653684975be4652f7
Author: Richard Hughes <richard hughsie com>
Date:   Tue Jul 26 09:09:45 2016 +0100

    trivial: Do not re-download the remote icon every time it's requested

 src/plugins/gs-plugin-icons.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)
---
diff --git a/src/plugins/gs-plugin-icons.c b/src/plugins/gs-plugin-icons.c
index 3490039..ec7919b 100644
--- a/src/plugins/gs-plugin-icons.c
+++ b/src/plugins/gs-plugin-icons.c
@@ -157,6 +157,10 @@ gs_plugin_icons_load_remote (GsPlugin *plugin, AsIcon *icon, GError **error)
                as_icon_set_filename (icon, fn_cache);
        }
 
+       /* already in cache */
+       if (g_file_test (as_icon_get_filename (icon), G_FILE_TEST_EXISTS))
+               return gs_plugin_icons_load_local (plugin, icon, error);
+
        /* a REMOTE that's really LOCAL */
        if (g_str_has_prefix (as_icon_get_url (icon), "file://")) {
                as_icon_set_filename (icon, as_icon_get_url (icon) + 7);