[cvs-nhc98] patch applied (hat): Don' t crash when encountering a (non-H' 98) instance declaration like

[Malcolm Wallace]

Fri Jun  4 07:09:27 PDT 2004  malcolm
  * Don't crash when encountering a (non-H'98) instance declaration like
      instance C (T Int) where ...
  i.e. datatype T has concrete types instead of variables.

    M ./src/compiler98/Rename.hs -4 +4
    M ./src/compiler98/SyntaxUtil.hs -1 +3