PVS-Studio warning V516 for Micro-Manager

class MP285
{
  ....
  static int  GetMotionMode() { return m_nMotionMode; }
  ....
};

int ZStage::_SetPositionSteps(....)
{
  ....
  if (MP285::GetMotionMode == 0)
  {
    long lOldZPosSteps = (long)MP285::Instance()->GetPositionZ();
    dSec = (double)labs(lZPosSteps-lOldZPosSteps) / dVelocity;
  }
  else
  {
     dSec = (double)labs(lZPosSteps) / dVelocity;
  }
  ....
}

This is what should have been written here: if (MP285::GetMotionMode() == 0)

This suspicious code was found in Micro-Manager project by PVS-Studio static code analyzer.
Warning message is:
V516 Consider inspecting an odd expression. Non-null function pointer is compared to null: 'MP285::GetMotionMode == 0'. MP285ZStage.cpp 558

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/