message: Fixed rtk::WriteImage in rtkGeneralPurposeFunctions.h, can now write const images
diff: @@ -86,7 +86,7 @@ ReadSignalFile(std::string filename)
  template< typename ImageType >
  void
  -WriteImage(typename ImageType::Pointer input, std::string name)
  +WriteImage(typename ImageType::ConstPointer input, std::string name)
  {
  //Create an itk::ImageFileWriter
  typedef itk::ImageFileWriter<ImageType> WriterType;
  