Fix crash when InnoDB temp table is truncated + fix bug: do not X-lock rows under LOCK TABLES except if the table is temp


sql/handler.h:
  Fix crash when InnoDB temp table is truncated + fix bug: do not X-lock rows under LOCK TABLES except if the table is temp
sql/sql_table.cc:
  Fix crash when InnoDB temp table is truncated + fix bug: do not X-lock rows under LOCK TABLES except if the table is temp
sql/ha_innodb.cc:
  Fix crash when InnoDB temp table is truncated + fix bug: do not X-lock rows under LOCK TABLES except if the table is temp
innobase/include/row0mysql.h:
  Fix crash when InnoDB temp table is truncated + fix bug: do not X-lock rows under LOCK TABLES except if the table is temp
innobase/row/row0mysql.c:
  Fix crash when InnoDB temp table is truncated + fix bug: do not X-lock rows under LOCK TABLES except if the table is temp