client: client_defer_output() can create the first defer buffer

client_defer_output() was designed to add new buffers to an existing
deferred_send buffer.  Tweak it and allow it to create a new buffer
list.

1 files changed, 5 insertions, 5 deletions

diff --git a/src/client.c b/src/client.c
index 2aa52de4..529e3012 100644
--- a/src/client.c
+++ b/src/client.c
@@ -722,7 +722,7 @@ int client_print(int fd, const char *buffer, size_t buflen)
 static void client_defer_output(struct client *client,
 				const void *data, size_t length)
 {
-	struct sllnode *buf;
+	struct sllnode **buf_r;
 
 	assert(client->deferred_send != NULL);
 
@@ -738,10 +738,10 @@ static void client_defer_output(struct client *client,
 		return;
 	}
 
-	buf = client->deferred_send;
-	while (buf->next)
-		buf = buf->next;
-	buf->next = new_sllnode(data, length);
+	buf_r = &client->deferred_send;
+	while (*buf_r != NULL)
+		buf_r = &(*buf_r)->next;
+	*buf_r = new_sllnode(data, length);
 }
 
 static void client_write_output(struct client *client)