Fix a memory leak with lc->lc_cap in login_close().

PR:		bin/17084

lib/libutil/login_cap.c

@@ -152,6 +152,7 @@ login_close(login_cap_t * lc)
     if (lc) {
 	free(lc->lc_style);
 	free(lc->lc_class);
+	free(lc->lc_cap);
 	free(lc);
 	if (--lc_object_count == 0) {
 	    free(internal_string);