message: BUG: check matrix vector length before accessing an element
diff: @@ -77,6 +77,10 @@ public:
  MatrixType
  GetMatrix(const unsigned int i) const
  {
  + if (i >= this->m_Matrices.size())
  + {
  + itkExceptionMacro(<< "Requested matrix index " << i << " is out of bound.");
  + }
  return this->m_Matrices[i];
  }
  