last: use sizeof_member

diff --git a/login-utils/last.c b/login-utils/last.c
index 84629278e5e4af613d8bbbbc32db85cd9648482b..77c122cfcf56dcfd3d30ea97ebcb8161bbad5e54 100644 (file)
--- a/login-utils/last.c
+++ b/login-utils/last.c
@@ -1055,10 +1055,10 @@ int main(int argc, char **argv)
                        ctl.until = (time_t) (p / 1000000);
                        break;
                case 'w':
-                       if (ctl.name_len < sizeof(((struct utmpx *) 0)->ut_user))
-                               ctl.name_len = sizeof(((struct utmpx *) 0)->ut_user);
-                       if (ctl.domain_len < sizeof(((struct utmpx *) 0)->ut_host))
-                               ctl.domain_len = sizeof(((struct utmpx *) 0)->ut_host);
+                       if (ctl.name_len < sizeof_member(struct utmpx, ut_user))
+                               ctl.name_len = sizeof_member(struct utmpx, ut_user);
+                       if (ctl.domain_len < sizeof_member(struct utmpx, ut_host))
+                               ctl.domain_len = sizeof_member(struct utmpx, ut_host);
                        break;
                case '0': case '1': case '2': case '3': case '4':
                case '5': case '6': case '7': case '8': case '9':