Fix -Wunused-but-set-warning with `ret`

While here, resolve Coverity warnings by demonstrating that vfprintf's
return value is being explicitly ignored.

MFC after:	1 week
Reported by:	gcc 6.3.0
Tested with:	clang, gcc 4.2.1, gcc 6.3.0
Sponsored by:	Dell EMC Isilon

1 files changed, 2 insertions, 3 deletions

diff --git a/sbin/dhclient/tests/fake.c b/sbin/dhclient/tests/fake.c
index c204d49402c5..91bbc6e42792 100644
--- a/sbin/dhclient/tests/fake.c
+++ b/sbin/dhclient/tests/fake.c
@@ -14,7 +14,7 @@ error(char *fmt, ...)
 	va_list ap;
 
 	va_start(ap, fmt);
-	vfprintf(stderr, fmt, ap);
+	(void)vfprintf(stderr, fmt, ap);
 	va_end(ap);
 	fprintf(stderr, "\n");
 
@@ -24,11 +24,10 @@ error(char *fmt, ...)
 int
 warning(char *fmt, ...)
 {
-	int ret;
 	va_list ap;
 
 	va_start(ap, fmt);
-	ret = vfprintf(stderr, fmt, ap);
+	(void)vfprintf(stderr, fmt, ap);
 	va_end(ap);
 	fprintf(stderr, "\n");