NAME
        AreaDraw -- Add a point to a list of end points for areafill.


   SYNOPSIS
        error = AreaDraw( rp,  x,     y)
          d0              A1 D0:16 D1:16

        ULONG AreaDraw( struct rastport *, short, short);

   FUNCTION
        Add point to the vector buffer.


   INPUTS
        rp      - points to a rastport structure.
        x,y     - are coordinates of a point in the raster.

   RESULT
        error   - zero for success, else -1 if no there was no space
                  left in the vector list.

   BUGS

   SEE ALSO
        areamove() initarea() areaend() graphics/rastport.h