extern pid_t child_open_uid(const uschar **, const uschar **, int,
uid_t *, gid_t *, int *, int *, uschar *, BOOL);
extern BOOL cleanup_environment(void);
-extern BOOL cutthrough_data_puts(uschar *, int);
-extern BOOL cutthrough_data_put_nl(void);
+extern void cutthrough_data_puts(uschar *, int);
+extern void cutthrough_data_put_nl(void);
extern uschar *cutthrough_finaldot(void);
extern BOOL cutthrough_flush_send(void);
extern BOOL cutthrough_headers_send(void);