websockets: handel SSL_AGAIN in non-connecting state

While it is harder to properly andle SSL_AGAIN in states other than
WS_CONNECTING first ssl_read is the same, so at least handle it
properly.

src/discord-websockets.c

@@ -208,6 +208,8 @@ static gboolean discord_ws_in_cb(gpointer data, int source,
     gboolean disconnected;
 
     if (ssl_read(dd->ssl, &buf, 1) < 1) {
+      if (ssl_errno == SSL_AGAIN)
+        return TRUE;
       imcb_error(ic, "Failed to read ws header.");
       discord_ws_reconnect(ic);
       return FALSE;