style fix

src/http/ngx_http_upstream.c

diff --git a/src/http/ngx_http_upstream.c b/src/http/ngx_http_upstream.c
index a88f5c5..3927836 100644
--- a/src/http/ngx_http_upstream.c
+++ b/src/http/ngx_http_upstream.c
@@ -969,7 +969,7 @@
     }
 
     n = u->peer.connection->recv(u->peer.connection, u->buffer.last,
-                                      u->buffer.end - u->buffer.last);
+                                 u->buffer.end - u->buffer.last);
 
     if (n == NGX_AGAIN) {
 #if 0