[epiphany] ephy-bookmark: Do not crash if time is negative

[Michael Catanzaro <mcatanzaro src gnome org>]

commit dd9f4c26d25ee75d4873d4d9bed350b2f6c19d54
Author: Jan-Michael Brummer <jan brummer tabos org>
Date:   Tue Dec 24 12:40:26 2019 +0100

    ephy-bookmark: Do not crash if time is negative
    
    Fixes: https://gitlab.gnome.org/GNOME/epiphany/issues/454

 src/bookmarks/ephy-bookmark.c | 3 +--
 1 file changed, 1 insertion(+), 2 deletions(-)
---
diff --git a/src/bookmarks/ephy-bookmark.c b/src/bookmarks/ephy-bookmark.c
index 5bb2706ec..5d84213ef 100644
--- a/src/bookmarks/ephy-bookmark.c
+++ b/src/bookmarks/ephy-bookmark.c
@@ -306,9 +306,8 @@ ephy_bookmark_set_time_added (EphyBookmark *self,
                               gint64        time_added)
 {
   g_assert (EPHY_IS_BOOKMARK (self));
-  g_assert (time_added >= 0);
 
-  self->time_added = time_added;
+  self->time_added = (time_added >= 0 ? time_added : g_get_real_time ());
 }
 
 gint64