* don't treat bitpacked arrays of subranges of char that can be represented
    using less than 8 bits per element the same as regular char arrays as far
    as automatic type conversions are concerned (they have to be explicitly
    packed/unpacked) (mantis #24013)

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@23739 3ad0048d-3df7-0310-abae-a5850022a9f2