VMS Help CC, Messages, TYPEDEFNA  *Conan The Librarian (sorry for the slow response - running on an old VAX)

 Message        Accepting an old-style parameter name that matches a
                typedef is a language extension.

 Description    The Compaq C compiler will allow old-style parameters
                to have the same name as a typedef.  Many other
                compilers will not allow this.

 User Action    Recode the function definition to use the standard C
                prototype syntax.