Fixed failing myisam.test and rpl_rotate_logs.test on some configurations


mysql-test/r/myisam.result:
  Portability fix
mysql-test/r/rpl_rotate_logs.result:
  Portability fix
mysql-test/t/myisam.test:
  Depending on if you compiled with -DHAVE_RAID or not, you could get different errors for this test
mysql-test/t/rpl_rotate_logs.test:
  Portability fix
sql/ha_innodb.cc:
  Fixed compiler warnings