utils/alsa.m4: include <stdlib.h> for exit()

[GitHub pull_request - opened]

alsa-project/alsa-lib pull request #278 was opened from thesamesam:

Clang 16 makes -Wimplicit-function-declaration an error by default and it's easier to just explicitly include <stdlib.h> rather than hope the ALSA headers always have it.

Signed-off-by: Sam James <sam at gentoo.org>

Request URL   : https://github.com/alsa-project/alsa-lib/pull/278
Patch URL     : https://github.com/alsa-project/alsa-lib/pull/278.patch
Repository URL: https://github.com/alsa-project/alsa-lib