Type of 'Slave_running' status variable is changed to bool


mysql-test/r/compress.result:
  test result
mysql-test/r/rpl_packet.result:
  test result
mysql-test/t/compress.test:
  test case
mysql-test/t/rpl_packet.test:
  test case
sql/mysqld.cc:
  Type of 'Slave_running' status variable is changed to bool