[PATCH] configure: Add -Wall again to the default CFLAGS

[Florian Weimer]

* Siddhesh Poyarekar:

> On 2023-08-14 07:49, Florian Weimer via Libc-alpha wrote:
>> Commit 78ceef25d64efeeb6067d1cb282a00466e637e2a ("configure: Remove
>> --enable-all-warnings option") removed it due to a missing +.
>> Tested with build-many-glibcs.py (glibcs stage only, full
>> compilers/glibcs test still running).  Needs -Wall fixes from the recent
>> malloc fix.
>> ---
>>   Makeconfig | 2 +-
>>   1 file changed, 1 insertion(+), 1 deletion(-)
>
> LGTM.
>
> Reviewed-by: Siddhesh Poyarekar <siddhesh@sourceware.org>

Thanks, I'll delay checking this in until after the latest malloc patch
is committed, which also removes the -Wall warnings that crept in.

Florian