PVS-Studio warning V575 for GLG3D

bool Matrix4::operator==(const Matrix4& other) const {
  if (memcmp(this, &other, sizeof(Matrix4) == 0)) {
    return true;
  }
  ...
}

A parenthesis put in a wrong place. This is how it should be: if (memcmp(this, &other, sizeof(Matrix4)) == 0) {

This suspicious code was found in GLG3D project by PVS-Studio static code analyzer.
Warning message is:
V575 The 'memcmp' function processes '0' elements. Inspect the 'third' argument. graphics3D matrix4.cpp 269

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/