[gnome-software] snap: Only store confinement when we know it

[Robert Ancell <rancell src gnome org>]

commit cb5b4120fac5a8ef659635f272bb43c4e4247b61
Author: Robert Ancell <robert ancell canonical com>
Date:   Thu Feb 22 12:51:56 2018 +1300

    snap: Only store confinement when we know it

 plugins/snap/gs-plugin-snap.c | 9 +++++----
 1 file changed, 5 insertions(+), 4 deletions(-)
---
diff --git a/plugins/snap/gs-plugin-snap.c b/plugins/snap/gs-plugin-snap.c
index c8463e1a..c67bd9f9 100644
--- a/plugins/snap/gs-plugin-snap.c
+++ b/plugins/snap/gs-plugin-snap.c
@@ -314,7 +314,6 @@ snap_to_app (GsPlugin *plugin, SnapdSnap *snap)
        GsApp *cached_app;
        g_autoptr(GsApp) app = NULL;
        SnapdConfinement confinement;
-       GEnumClass *enum_class;
 
        switch (snapd_snap_get_snap_type (snap)) {
        case SNAPD_SNAP_TYPE_APP:
@@ -348,9 +347,11 @@ snap_to_app (GsPlugin *plugin, SnapdSnap *snap)
                gs_app_add_quirk (app, AS_APP_QUIRK_PROVENANCE);
 
        confinement = snapd_snap_get_confinement (snap);
-       enum_class = g_type_class_ref (SNAPD_TYPE_CONFINEMENT);
-       gs_app_set_metadata (app, "snap::confinement", g_enum_get_value (enum_class, 
confinement)->value_nick);
-       g_type_class_unref (enum_class);
+       if (confinement != SNAPD_CONFINEMENT_UNKNOWN) {
+               GEnumClass *enum_class = g_type_class_ref (SNAPD_TYPE_CONFINEMENT);
+               gs_app_set_metadata (app, "snap::confinement", g_enum_get_value (enum_class, 
confinement)->value_nick);
+               g_type_class_unref (enum_class);
+       }
 
        if (priv->system_confinement == SNAPD_SYSTEM_CONFINEMENT_STRICT && confinement == 
SNAPD_CONFINEMENT_STRICT)
                gs_app_add_kudo (app, GS_APP_KUDO_SANDBOXED);