statements.


mysql-test/r/sp.result:
  Added row_count() test for non-insert/update/delete statement.
mysql-test/t/sp.test:
  Added row_count() test for non-insert/update/delete statement.
sql/sql_class.h:
  thd->row_count_func must be signed for JDBC/ODBC (can be -1).
sql/sql_parse.cc:
  Reset thd->row_count_func to -1 for non-insert/update/delete statements.