curl_ngtcp2: extend callback tables for nghttp3 1.11.0 and ngtcp2 1.14.0

An emergency update to initialize callbacks to NULL.

May need further updates, e.g. to provide the recommended random
generator callback for nghttp3.

Fixing potential crashes at runtime in curl-for-win 8.15.0_3, and these
build warnings:
```
/home/appveyor/projects/curl-for-win/curl/lib/vquic/curl_ngtcp2.c:836:1:
warning: missing field 'begin_path_validation' initializer [-Wmissing-field-initializers]
  836 | };
      | ^
/home/appveyor/projects/curl-for-win/curl/lib/vquic/curl_ngtcp2.c:1186:1:
warning: missing field 'recv_origin' initializer [-Wmissing-field-initializers]
 1186 | };
      | ^
2 warnings generated.
```
Ref: https://ci.appveyor.com/project/curlorg/curl-for-win/builds/52462852#L14821

Also causing all `GHA/curl-for-win` jobs to fail:
https://github.com/curl/curl/actions/runs/16523625082?pr=18010

Ref: https://github.com/ngtcp2/nghttp3/releases/tag/v1.11.0
Ref: https://github.com/ngtcp2/ngtcp2/releases/tag/v1.14.0
Ref: https://github.com/curl/curl-for-win/commit/ff788c81e44f998d0d41f362d442a7e97cc0fd46

Closes #18019

diff --git a/lib/vquic/curl_ngtcp2.c b/lib/vquic/curl_ngtcp2.c
index 2cda65aa03f1cb8886de26e4e6bd737ce851fdc8..052f280afc150dcf3ce4b4f7890493e3df316331 100644 (file)
--- a/lib/vquic/curl_ngtcp2.c
+++ b/lib/vquic/curl_ngtcp2.c
@@ -833,6 +833,9 @@ static ngtcp2_callbacks ng_callbacks = {
   cb_recv_rx_key,
   NULL, /* recv_tx_key */
   NULL, /* early_data_rejected */
+#ifdef NGTCP2_CALLBACKS_V2
+  NULL, /* begin_path_validation */
+#endif
 };
 
 #if defined(_MSC_VER) && defined(_DLL)
@@ -1182,7 +1185,12 @@ static nghttp3_callbacks ngh3_callbacks = {
   NULL, /* end_stream */
   cb_h3_reset_stream,
   NULL, /* shutdown */
-  NULL /* recv_settings */
+  NULL, /* recv_settings */
+#ifdef NGHTTP3_CALLBACKS_V2
+  NULL, /* recv_origin */
+  NULL, /* end_origin */
+  NULL, /* rand */
+#endif
 };
 
 static CURLcode init_ngh3_conn(struct Curl_cfilter *cf,