Move to the right place the flag which bans use of HA_READ_PREFIX_LAST; add diagnostics and remove the assertion on line 2180 of ha_innodb.cc


sql/ha_innodb.h:
  Move to the right place the flag which bans use of HA_READ_PREFIX_LAST; add diagnostics and remove the assertion on line 2180 of ha_innodb.cc
sql/ha_innodb.cc:
  Move to the right place the flag which bans use of HA_READ_PREFIX_LAST; add diagnostics and remove the assertion on line 2180 of ha_innodb.cc