File bash-4.2-boo976776.dif of Package bash.2451

Avoid crash on empty ~/.bash_history in case su is used (boo#976776)

---
 lib/readline/history.c |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

--- lib/readline/history.c
+++ lib/readline/history.c	2016-04-26 09:29:22.197488997 +0000
@@ -318,7 +318,7 @@ add_history_time (string)
 {
   HIST_ENTRY *hs;
 
-  if (string == 0)
+  if (string == 0 || history_length < 0)
     return;
   hs = the_history[history_length - 1];
   FREE (hs->timestamp);