http2: use FIRSTSOCKET instead of 0 to index the sockets array

diff --git a/lib/http2.c b/lib/http2.c
index 6df3511fe4630404ddb93ec75c6c48e4a3b46fa2..b7edbc590ec76c7422a4f0a992bff4772869ffc5 100644 (file)
--- a/lib/http2.c
+++ b/lib/http2.c
@@ -89,7 +89,7 @@ static ssize_t send_callback(nghttp2_session *h2,
   struct connectdata *conn = (struct connectdata *)userp;
   ssize_t written;
   CURLcode rc =
-    Curl_write(conn, conn->sock[0], data, length, &written);
+    Curl_write(conn, conn->sock[FIRSTSOCKET], data, length, &written);
   (void)h2;
   (void)flags;