tls_openssl: Fix checks for SSL_ERROR_WANT_WRITE in nonblocking operation

This was a typo in 0671eb23, spotted by Chris Carroux.
Signed-off-by: Martin Storsjö <martin@martin.st>

libavformat/tls_openssl.c

@@ -112,7 +112,7 @@ static int print_tls_error(URLContext *h, int ret)
     TLSContext *c = h->priv_data;
     if (h->flags & AVIO_FLAG_NONBLOCK) {
         int err = SSL_get_error(c->ssl, ret);
-        if (err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_READ)
+        if (err == SSL_ERROR_WANT_READ || err == SSL_ERROR_WANT_WRITE)
             return AVERROR(EAGAIN);
     }
     av_log(h, AV_LOG_ERROR, "%s\n", ERR_error_string(ERR_get_error(), NULL));