Backport of bug fix in 4.0: do not x-lock rows under LOCK TABLES READ unless the table is a temp table


innobase/include/row0mysql.h:
  Backport of bug fix in 4.0: do not x-lock rows under LOCK TABLES READ unless the table is a temp table
innobase/row/row0mysql.c:
  Backport of bug fix in 4.0: do not x-lock rows under LOCK TABLES READ unless the table is a temp table