- fix MYSQL_NO_DASH_VERSION if version number ends on one digit only
   ("comment" test failed when MySQL version was changed from 4.0.5
   to 4.0.5a)


configure.in:
   - fix MYSQL_NO_DASH_VERSION if version number ends on one digit only
     ("comment" test failed when MySQL version was changed from 4.0.5
     to 4.0.5a)