* tuiRegs.c (tuiDisplayRegistersFrom): Set scrollok to FALSE in
each register window.
(tuiCheckRegisterValues): Use REGISTER_RAW_SIZE to obtain the size
of the register to check.
(_tuiRegValueHasChanged): Likewise.
(_tuiRegisterName): Use REGISTER_NAME.
(tui_restore_gdbout): New function.
(_tuiRegisterFormat): Use do_registers_info with gdb_stdout redirected
to a string.
(START_SPECIAL_REGS): Define.
(_tuiGetRegisterRawValue): Use get_saved_register.
(_tuiDisplayRegister): Fix clearing of register window.