PVS-Studio warning V599 for MTASA

class CKeyBind
{
  //A virtual destructor is absent
  ....
};

class CKeyBindWithState: public CKeyBind { .... };
class CGTAControlBind: public CKeyBind { .... };

void CKeyBinds::Remove ( CKeyBind* pKeyBind )
{
  if ( m_bProcessingKeyStroke ) pKeyBind->beingDeleted = true;
  else
  {
    m_pList->remove ( pKeyBind );
    delete pKeyBind;
  }
}

This suspicious code was found in MTASA project by PVS-Studio static code analyzer.
Warning message is:
V599 The virtual destructor is not present, although the 'CKeyBind' class contains virtual functions. ckeybinds.cpp 488

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/