large table gives server crash": make sure that when a MyISAM temporary
table is created for a cursor, it's created in its memory root,
not the memory root of the current query.


mysql-test/r/sp.result:
  Test results fixed: a test case for Bug#14210
mysql-test/t/sp.test:
  A test case for Bug#14210 "Simple query with > operator on large table 
  gives server crash"
sql/handler.cc:
  - rewrite get_new_handler to accept a memory root and use it for
sql/handler.h:
  - get_new_handler declaration changed
sql/opt_range.cc:
  - get_new_handler declaration changed
sql/sql_base.cc:
  - get_new_handler declaration changed
sql/sql_select.cc:
  - the actual fix for Bug#14210. In create_myisam_from_heap we should
  create the new table handler in TABLE::mem_root, not in THD::mem_root:
  the latter is freed shortly after cursor is open.
  - adjust create_tmp_table to explicitly supply &table->mem_root
  to get_new_handler when creating a handler for a new temporary table
sql/sql_table.cc:
  - get_new_handler declaration changed
sql/table.cc:
  - get_new_handler declaration changed
sql/unireg.cc:
  - get_new_handler declaration changed
tests/mysql_client_test.c:
  A test case for Bug#14210 "Simple query with > operator on large table
   gives server crash": a C API test case is worth adding because of different
  memory allocation/freeing patterns in handling of C API and SP cursors