PVS-Studio warning V512 for Micro-Manager

typedef struct _DCMOTSTATUS
{
  unsigned short wChannel;   // Channel ident.
  unsigned int lPosition;    // Position in encoder counts.
  unsigned short wVelocity;  // Velocity in encoder counts/sec.
  unsigned short wReserved;  // Controller specific use
  unsigned int dwStatusBits; // Status bits (see #defines below).
} DCMOTSTATUS;

int MotorStage::ParseStatus(const unsigned char* buf, int bufLen,
  DCMOTSTATUS& stat)
{
  ....
  memcpy(&stat.lPosition, buf + bufPtr, sizeof(long));  //<<<(1)
  bufPtr += sizeof(long);

  memcpy(&stat.wVelocity, buf + bufPtr, sizeof(unsigned short));
  bufPtr += sizeof(unsigned short);

  memcpy(&stat.wReserved, buf + bufPtr, sizeof(unsigned short));
  bufPtr += sizeof(unsigned short);

  memcpy(&stat.dwStatusBits,
         buf + bufPtr, sizeof(unsigned long));          //<<<(2)
  return DEVICE_OK;
}

(1) - Not critical. (2) - Critical.

This suspicious code was found in Micro-Manager project by PVS-Studio static code analyzer.
Warning message is:
V512 A call of the 'memcpy' function will lead to overflow of the buffer '& stat.lPosition'. MotorStage.cpp 247

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/