PVS-Studio warning V595 for TrinityCore

bool OnCheck(Player* player, Unit* /*target*/)
{
  bool checkArea =
    player->GetAreaId() == AREA_ARGENT_TOURNAMENT_FIELDS ||
    player->GetAreaId() == AREA_RING_OF_ASPIRANTS ||
    player->GetAreaId() == AREA_RING_OF_ARGENT_VALIANTS ||
    player->GetAreaId() == AREA_RING_OF_ALLIANCE_VALIANTS ||
    player->GetAreaId() == AREA_RING_OF_HORDE_VALIANTS ||
    player->GetAreaId() == AREA_RING_OF_CHAMPIONS;

  return player && checkArea && player->duel
    && player->duel->isMounted;
}

This suspicious code was found in TrinityCore project by PVS-Studio static code analyzer.
Warning message is:
V595 The 'player' pointer was utilized before it was verified against nullptr. Check lines: 310, 312. scripts achievement_scripts.cpp 310

PVS-Studio is a static analyzer for detecting bugs in the source code of applications written in C, C++, C++11, C++/CX. Site: http://www.viva64.com/en/pvs-studio/