select.c: Make the ugly hacker uglier...

Right now I'm seeing crashes when removing a link and deleting
it and I need this hack to make it not crash. We will have to
understand if llist_for_each_entry_safe has a bug or if we are
doing something bad with the list (anchors not properly initialized).
diff --git a/src/select.c b/src/select.c
index 9517778..2f6afa7 100644
--- a/src/select.c
+++ b/src/select.c
@@ -121,7 +121,8 @@
 		/* ugly, ugly hack. If more than one filedescriptors were
 		 * unregistered, they might have been consecutive and
 		 * llist_for_each_entry_safe() is no longer safe */
-		if (unregistered_count > 1)
+		/* this seems to happen with the last element of the list as well */
+		if (unregistered_count >= 1)
 			goto restart;
 	}
 	return work;