src: fix size of CounterSet

PR-URL: #16984
Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Tobias Nießen <tniessen@tnie.de>
Reviewed-By: Anna Henningsen <anna@addaleax.net>

src/node_win32_perfctr_provider.cc

@@ -159,7 +159,7 @@ void InitPerfCountersWin32() {
 
     status = perfctr_setCounterSetInfo(NodeCounterProvider,
                                        &NodeCounterSetInfo.CounterSet,
-                                       sizeof(NodeCounterSetInfo));
+                                       sizeof(NodeCounterSetInfo.CounterSet));
     if (status != ERROR_SUCCESS) {
       perfctr_stopProvider(NodeCounterProvider);
       NodeCounterProvider = nullptr;