Avoid segfault when LOAD DATA FROM MASTER is run on a master which does no

binary logging.


sql/repl_failsafe.cc:
  If the master is running without --log-bin, SHOW MASTER STATUS will return
  "empty set", i.e. row==0; we must test this before invoking row[0], or
  segfault.

sql/repl_failsafe.cc

@@ -860,7 +860,7 @@ int load_master_data(THD* thd)
 	of LOAD DATA FROM MASTER - no reason to forbid it, really,
 	although it does not make much sense for the user to do it
       */
-      if (row[0] && row[1])
+      if (row && row[0] && row[1])
       {
 	strmake(active_mi->master_log_name, row[0],
 		sizeof(active_mi->master_log_name));