PVS-Studio warning V511 for Source SDK

#define RTL_NUMBER_OF_V1(A) (sizeof(A)/sizeof((A)[0]))
#define _ARRAYSIZE(A)   RTL_NUMBER_OF_V1(A)

int GetAllNeighbors( const CCoreDispInfo *pDisp,
                     int iNeighbors[512] )
{
  ....
  if ( nNeighbors < _ARRAYSIZE( iNeighbors ) )
    iNeighbors[nNeighbors++] = pCorner->m_Neighbors[i];
  ....
}

This suspicious code was found in Source SDK project by PVS-Studio static code analyzer.
Warning message is:
V511 The sizeof() operator returns size of the pointer, and not of the array, in 'sizeof (iNeighbors)' expression. Vrad_dll disp_vrad.cpp 60

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/