* don't allow default parameter values for parameter types that don't accept
    constant values (i.e., anything non-value/const/constref) (mantis #263363)
   o fixed default parameter value for var-parameter in chmreader

git-svn-id: http://svn.freepascal.org/svn/fpc/trunk@28016 3ad0048d-3df7-0310-abae-a5850022a9f2