PVS-Studio warning V512 for MAME

#define CHD_SHA1_BYTES    20
#define CHD_V4_HEADER_SIZE   108
#define CHD_MAX_HEADER_SIZE   CHD_V4_HEADER_SIZE

static chd_error header_read(...., chd_header *header)
{
  UINT8 rawheader[CHD_MAX_HEADER_SIZE];
  ...
  memcpy(header->parentsha1, &rawheader[100],
         CHD_SHA1_BYTES);
  ...
}

This suspicious code was found in MAME project by PVS-Studio static code analyzer.
Warning message is:
V512 A call of the 'memcpy' function will lead to the '& rawheader[100]' buffer becoming out of range.  chd.c 1870

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/