[seahorse-plugins] Use plural form for translatable string.

[Friedel Wolff <fwolff src gnome org>]

commit 3d8c0236d8041499b96aaced61f71c3b7d895c08
Author: Friedel Wolff <friedel translate org za>
Date:   Wed Aug 31 11:31:07 2011 +0200

    Use plural form for translatable string.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=648896

 plugins/nautilus/seahorse-tool-files.c |    3 +--
 1 files changed, 1 insertions(+), 2 deletions(-)
---
diff --git a/plugins/nautilus/seahorse-tool-files.c b/plugins/nautilus/seahorse-tool-files.c
index d3534d7..70e06a4 100644
--- a/plugins/nautilus/seahorse-tool-files.c
+++ b/plugins/nautilus/seahorse-tool-files.c
@@ -342,8 +342,7 @@ make_message (guint folders, guint files)
         
     } else if (files > 0) {
         
-        g_assert (files > 1);    /* should never be called for just one file */
-        return g_strdup_printf (_("You have selected %d files"), files);
+        return g_strdup_printf (ngettext ("You have selected %d file", "You have selected %d files", files), files);
 
     } else if (folders > 0) {