Message        <Context> HP C recognizes the standard C keyword
                "signed" in member declarations.  The VAX C compiler
                does not and would treat the member as unsigned.

 Description    VAX C does not recognize the "signed" keyword in a
                member declaration.  VAX C will treat the member as
                an unsigned type.  HP C will recognize the keyword
                and declare the member as a signed type.

 User Action    Be aware of this difference if you plan to compile
                the source with VAX C.