fix "expr has no effect" warning

diff --git a/include/libbb.h b/include/libbb.h
index def6124d7bde787c7c2d4d5d1ac356fb9a7b0bab..d2da056f75980b2b11270616db0348b3bb322747 100644 (file)
--- a/include/libbb.h
+++ b/include/libbb.h
@@ -321,7 +321,7 @@ len_and_sockaddr* host2sockaddr(const char *host, int port);
 len_and_sockaddr* host_and_af2sockaddr(const char *host, int port, sa_family_t af);
 #else
 /* [we evaluate af: think about "host_and_af2sockaddr(..., af++)"] */
-#define host_and_af2sockaddr(host, port, af) ((af), host2sockaddr((host), (port)))
+#define host_and_af2sockaddr(host, port, af) ((void)(af), host2sockaddr((host), (port)))
 #endif
 /* Assign sin[6]_port member if the socket is of corresponding type,
  * otherwise no-op. Useful for ftp.