PVS-Studio warning V579 for UnrealEngine4

bool FRecastQueryFilter::IsEqual(
  const INavigationQueryFilterInterface* Other) const
{
  // @NOTE: not type safe, should be changed when
  // another filter type is introduced
  return FMemory::Memcmp(this, Other, sizeof(this)) == 0;
}

This suspicious code was found in UnrealEngine4 project by PVS-Studio static code analyzer.
Warning message is:
V579 The Memcmp function receives the pointer and its size as arguments. It is possibly a mistake. Inspect the third argument. pimplrecastnavmesh.cpp 172

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/