ws2_32: Return WSAEINVAL from GetAddrInfoExOverlappedResult if overlapped is NULL.

dlls/ws2_32/protocol.c

@@ -514,6 +514,10 @@ int WINAPI GetAddrInfoExW( const WCHAR *name, const WCHAR *servname, DWORD names
 int WINAPI GetAddrInfoExOverlappedResult( OVERLAPPED *overlapped )
 {
     TRACE( "(%p)\n", overlapped );
+
+    if (!overlapped)
+        return WSAEINVAL;
+
     return overlapped->Internal;
 }
 

dlls/ws2_32/tests/protocol.c

@@ -1904,6 +1904,9 @@ static void test_GetAddrInfoExW(void)
     ok(!ret, "GetAddrInfoExW failed with %d\n", WSAGetLastError());
     pFreeAddrInfoExW(result);
 
+    ret = pGetAddrInfoExOverlappedResult(NULL);
+    ok(ret == WSAEINVAL, "overlapped result is %d\n", ret);
+
     result = (void *)0xdeadbeef;
     memset(&overlapped, 0xcc, sizeof(overlapped));
     overlapped.hEvent = event;