file /libfb/if_tk.c
#if TK_MINOR_VERSION < 5
        Tk_PhotoPutBlock(fbphoto, &block, x, ifp->if_height-y,
                         count, 1, TK_PHOTO_COMPOSITE_SET);
#else
        Tk_PhotoPutBlock(interp ,fbphoto, &block , x, ifp->if_height-y,
                         count, TK_PHOTO_COMPOSITE_SET);
#endif

        return  count;

I put the conditionals in and the missing code, did I get it right?