message: enable processing of 16, 32 and 64 bit 4 channel data using GDAL1.2
diff: @@ -308,6 +308,11 @@ void write_pixel( const double& pixelValue,
  // input: 4 channel, output: 4 channel
  else if( gdalChannels == 4 && image.channels() == 4 ){
  if( image.depth() == CV_8U ){ image.at<Vec4b>(row,col)[channel] = newValue; }
  + else if( image.depth() == CV_16U ){ image.at<Vec4s>(row,col)[channel] = newValue; }
  + else if( image.depth() == CV_16S ){ image.at<Vec4s>(row,col)[channel] = newValue; }
  + else if( image.depth() == CV_32S ){ image.at<Vec4i>(row,col)[channel] = newValue; }
  + else if( image.depth() == CV_32F ){ image.at<Vec4f>(row,col)[channel] = newValue; }
  + else if( image.depth() == CV_64F ){ image.at<Vec4d>(row,col)[channel] = newValue; }
  else{ throw std::runtime_error("Unknown image depth, gdal: 4, image: 4"); }
  }
  