message: fix gcc compile for distanceField3.h
diff: @@ -186,9 +186,9 @@ namespace ml {
  void setTruncation(float truncation, bool updateValues = true) {
  m_truncation = truncation;
  if (updateValues) {
  - for (unsigned int z = 0; z < m_dimZ; z++) {
  - for (unsigned int y = 0; y < m_dimY; y++) {
  - for (unsigned int x = 0; x < m_dimX; x++) {
  + for (unsigned int z = 0; z < this->m_dimZ; z++) {
  + for (unsigned int y = 0; y < this->m_dimY; y++) {
  + for (unsigned int x = 0; x < this->m_dimX; x++) {
  float v = (*this)(x, y, z);
  if (v > truncation) (*this)(x, y, z) = truncation;
  } //x
  