[Qemu-trivial] [PATCH] configure: use valid args testing sem_timedwait

[Daniel P . Berrangé]

The sem_timedwait function has been annotated as requiring
non-null args in latest header files from GCC snapshot
representing the future 2.30 release.

This causes configure to fail when -Werror is used:

config-temp/qemu-conf.c: In function ‘main’:
config-temp/qemu-conf.c:2:25: error: null argument where non-null required 
(argument 1) [-Werror=nonnull]
    2 | int main(void) { return sem_timedwait(0, 0); }
      |                         ^~~~~~~~~~~~~
config-temp/qemu-conf.c:2:25: error: null argument where non-null required 
(argument 2) [-Werror=nonnull]

Signed-off-by: Daniel P. Berrangé <address@hidden>
---
 configure | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/configure b/configure
index b091b82cb3..6632d05fc7 100755
--- a/configure
+++ b/configure
@@ -5139,7 +5139,7 @@ fi
 sem_timedwait=no
 cat > $TMPC << EOF
 #include <semaphore.h>
-int main(void) { return sem_timedwait(0, 0); }
+int main(void) { sem_t s; struct timespec t = {0}; return sem_timedwait(&s, 
&t); }
 EOF
 if compile_prog "" "" ; then
     sem_timedwait=yes
-- 
2.21.0