src: move default assignment of async_id_ in async_wrap.h

Moving the default assignment of async_id from the constructor in
async_wrap.cc to class definition in async_wrap.h

PR-URL: #23495
Reviewed-By: Anna Henningsen <anna@addaleax.net>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Gireesh Punathil <gpunathi@in.ibm.com>
Reviewed-By: James M Snell <jasnell@gmail.com>
Reviewed-By: Shelley Vohr <codebytere@gmail.com>
Reviewed-By: Sakthipriyan Vairamani <thechargingvolcano@gmail.com>
Reviewed-By: Trivikram Kamat <trivikr.dev@gmail.com>

src/async_wrap.cc

@@ -563,7 +563,6 @@ AsyncWrap::AsyncWrap(Environment* env,
   CHECK_NE(provider, PROVIDER_NONE);
   CHECK_GE(object->InternalFieldCount(), 1);
 
-  async_id_ = -1;
   // Use AsyncReset() call to execute the init() callbacks.
   AsyncReset(execution_async_id, silent);
 }

src/async_wrap.h

@@ -200,7 +200,7 @@ class AsyncWrap : public BaseObject {
   inline AsyncWrap();
   const ProviderType provider_type_;
   // Because the values may be Reset(), cannot be made const.
-  double async_id_;
+  double async_id_ = -1;
   double trigger_async_id_;
 };