compare setsockopt result to 0 before returning

src/core/iomgr/socket_utils_common_posix.c

@@ -92,7 +92,7 @@ int grpc_set_socket_no_sigpipe_if_possible(int fd) {
 int grpc_set_socket_ip_pktinfo_if_possible(int fd) {
 #ifdef GPR_HAVE_IP_PKTINFO
   int get_local_ip = 1;
-  return setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &get_local_ip,
+  return 0 == setsockopt(fd, IPPROTO_IP, IP_PKTINFO, &get_local_ip,
                          sizeof(get_local_ip));
 #else
   return 1;
@@ -102,7 +102,7 @@ int grpc_set_socket_ip_pktinfo_if_possible(int fd) {
 int grpc_set_socket_ipv6_recvpktinfo_if_possible(int fd) {
 #ifdef GPR_HAVE_IPV6_RECVPKTINFO
   int get_local_ip = 1;
-  return setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &get_local_ip,
+  return 0 == setsockopt(fd, IPPROTO_IPV6, IPV6_RECVPKTINFO, &get_local_ip,
                          sizeof(get_local_ip));
 #else
   return 1;