Move reset of insert_values to ensure it's done also during error conditions

This fixed a failure of insert_update.test on some platforms

mysys/thr_alarm.c

@@ -86,6 +86,7 @@ void init_thr_alarm(uint max_alarms)
   {
     struct sigaction sact;
     sact.sa_flags = 0;
+    bzero((char*) &sact, sizeof(sact));
     sact.sa_handler = thread_alarm;
     sigaction(THR_CLIENT_ALARM, &sact, (struct sigaction*) 0);
   }