[cvs-nhc98] patch applied (hat): Accept " data T a; " as a valid declaration of an abstract datatype.

[Malcolm Wallace]

Mon Sep  9 06:13:28 PDT 2002  malcolm
  * Accept "data T a;" as a valid declaration of an abstract datatype.
  There are no values of such a type, unless it is otherwise known to
  the compiler, or used in an FFI call (e.g. Ptr a).

    M ./src/compiler98/Parse.hs -4 +6