gettext should not be a builtin

[Joseph S. Myers]

On Tue, 1 Jul 2003, DJ Delorie wrote:

> 1) Compiler error received:
> 
>   In file included from test.c:1:
>   c:/ab/djgpp/include/conio.h:74: error:
>     nonnull argument references non-pointer operand (arg 1, operand 1)

Changing handle_nonnull_attribute to check ATTR_FLAG_BUILT_IN before
giving errors, as handle_format_arg_attribute does, should fix the
problem.

-- 
Joseph S. Myers
jsm28@cam.ac.uk