PVS-Studio warning V519 for OGRE

void TerrainMaterialGeneratorA::SM2Profile::addTechnique(....)
{
  ...
  TextureUnitState* tu;
  ...
  for (uint i = 0; i < numLayers; ++i)
  {
    // diffuse / specular
    tu = pass->createTextureUnitState(
                 terrain->getLayerTextureName(i, 0));
    // normal / height
    tu = pass->createTextureUnitState(
                 terrain->getLayerTextureName(i, 1));
  }
  ...
}

This suspicious code was found in OGRE project by PVS-Studio static code analyzer.
Warning message is:
V519 The 'tu' variable is assigned values twice successively. Perhaps this is a mistake. Check lines: 370, 372. OgreTerrain ogreterrainmaterialgeneratora.cpp 372

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/