asyn-thrdd: fix no HAVE_GETADDRINFO builds

mingw32ce, CM 4.4.0-arm schannel:
```
lib/asyn-thrdd.c: In function 'gethostbyname_thread':
lib/asyn-thrdd.c:349: error: too many arguments to function 'async_thrd_cleanup'
```
Ref: https://github.com/curl/curl/actions/runs/17158865566/job/48682687295?pr=18039#step:9:21

Follow-up to 88fc6c4 curl#18263
Closes curl#18371

Author: vszakats

lib/asyn-thrdd.c

@@ -346,7 +346,7 @@ static CURL_THREAD_RETURN_T CURL_STDCALL gethostbyname_thread(void *arg)
 #pragma clang diagnostic pop
 #endif
 
-  async_thrd_cleanup(addr_ctx, 0);
+  async_thrd_cleanup(addr_ctx);
   return 0;
 }