Fix potential bug: if MySQL calls store_lock with the TL_IGNORE argument in the middle of query processing, then InnoDB select_lock_type could be reset to LOCK_NONE in a wrong place


sql/ha_innodb.cc:
  Fix potential bug: if MySQL calls store_lock with the TL_IGNORE argument in the middle of query processing, then InnoDB select_lock_type could be reset to LOCK_NONE in a wrong place