io: fix maybe-uninitialized warning in test (-O2)

[ccan] / ccan / io / io.h

diff --git a/ccan/io/io.h b/ccan/io/io.h
index 9316dd180a9895adc2f60fdb6cdaeff6d77deb4a..68dd56876333293989411ccbb7206acf6001e766 100644 (file)
--- a/ccan/io/io.h
+++ b/ccan/io/io.h
@@ -47,7 +47,8 @@ struct io_conn;
  *     int fd[2];
  *     struct io_conn *conn;
  *
  *     int fd[2];
  *     struct io_conn *conn;
  *

- *     pipe(fd);
+ *     if (pipe(fd) != 0)
+ *             exit(1);

  *     conn = io_new_conn(NULL, fd[0], conn_init, (const char *)"hi!");
  *     if (!conn)
  *             exit(1);
  *     conn = io_new_conn(NULL, fd[0], conn_init, (const char *)"hi!");
  *     if (!conn)
  *             exit(1);