The problem was that memory was free'd, but it was referenced
later. This free was unneccessary anyway, because join_free() /
JOIN::cleanup takes care of this later on.

Added test case into t/subselect.test for it.

Regards,
Jani


mysql-test/r/subselect.result:
  Added a test case for Bug#2479.
mysql-test/t/subselect.test:
  Added a test case for Bug#2479.
sql/sql_select.cc:
  Fixed Bug#2479, "dependant subquery with limit crash".
  The problem was that memory was free'd, but it was referenced
  later. This free was unneccessary anyway, because join_free() /
  JOIN::cleanup takes care of this later on.