test-sys_socket: mark variables as used more readably

* tests/test-sys_socket.c (main): Mark otherwise unused variables
as "used" explicitly via (void) statement casts.  This is more
readable than using them in an artificial return expression.
Suggestion from Bruno Haible.

1 files changed, 5 insertions, 1 deletions

diff --git a/tests/test-sys_socket.c b/tests/test-sys_socket.c
index 6ea6a7390a..1c3b5607cd 100644
--- a/tests/test-sys_socket.c
+++ b/tests/test-sys_socket.c
@@ -49,5 +49,9 @@ main (void)
   x.ss_family = 42;
   i = 42;
 
-  return ! (i + x.ss_family);
+  /* Tell the compiler that these variables are used.  */
+  (void) x;
+  (void) i;
+
+  return 0;
 }