[totem/wip/hadess/unknown-context] properties: Add context to "Unknown" strings

[Bastien Nocera <hadess src gnome org>]

commit f4fd312c4509026c1e67f8733a4da48503849f34
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Feb 12 17:21:18 2019 +0100

    properties: Add context to "Unknown" strings
    
    Closes: #299

 src/plugins/properties/bacon-video-widget-properties.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)
---
diff --git a/src/plugins/properties/bacon-video-widget-properties.c 
b/src/plugins/properties/bacon-video-widget-properties.c
index df6583555..6c5e10292 100644
--- a/src/plugins/properties/bacon-video-widget-properties.c
+++ b/src/plugins/properties/bacon-video-widget-properties.c
@@ -103,19 +103,19 @@ bacon_video_widget_properties_reset (BaconVideoWidgetProperties *props)
        gtk_widget_set_sensitive (item, FALSE);
 
        /* Title */
-       bacon_video_widget_properties_set_label (props, "title", _("Unknown"));
+       bacon_video_widget_properties_set_label (props, "title", C_("Title", "Unknown"));
        /* Artist */
-       bacon_video_widget_properties_set_label (props, "artist", _("Unknown"));
+       bacon_video_widget_properties_set_label (props, "artist", C_("Artist", "Unknown"));
        /* Album */
-       bacon_video_widget_properties_set_label (props, "album", _("Unknown"));
+       bacon_video_widget_properties_set_label (props, "album", C_("Album", "Unknown"));
        /* Year */
-       bacon_video_widget_properties_set_label (props, "year", _("Unknown"));
+       bacon_video_widget_properties_set_label (props, "year", C_("Year", "Unknown"));
        /* Duration */
        bacon_video_widget_properties_set_duration (props, 0);
        /* Comment */
        bacon_video_widget_properties_set_label (props, "comment", "");
        /* Container */
-       bacon_video_widget_properties_set_label (props, "container", _("Unknown"));
+       bacon_video_widget_properties_set_label (props, "container", C_("Media container", "Unknown"));
 
        /* Dimensions */
        bacon_video_widget_properties_set_label (props, "dimensions", C_("Dimensions", "N/A"));