Expected behavior

I am converting images to thumbnail with this version 0.4.8.

The test code is below:

ImageInputStream input = ImageIO.createImageInputStream("d:/test.jpg");
ImageReader reader = ImageIO.getImageReaders(input).next();
reader.setInput(input, true, true);
Orientation orientation = ExifUtils.getExifOrientation(reader, 0);

Expected getting and orientation object or null object.

Actual behavior

But I got:

java.lang.NullPointerException
	at net.coobird.thumbnailator.util.exif.ExifUtils.readIFD(Unknown Source)
	at net.coobird.thumbnailator.util.exif.ExifUtils.getOrientationFromExif(Unknown Source)
	at net.coobird.thumbnailator.util.exif.ExifUtils.getExifOrientation(Unknown Source)

Steps to reproduce the behavior

In mothed readIFD of ExifUtils.java, the thread got the value of type is 10, but In class IfdType has not value "10" . Occording to the specification "CIPA DC-008-2012"(https://www.cipa.jp/std/documents/e/DC-008-2012_E.pdf)
, the value of IfdType.SROTIONAL should be 10. But in source code, it is SRATIONAL(5, SLONG.size() * 2).

Environment

• OS vendor and version: win10
• JDK vendor and version: 1.8
• Thumbnailator version: version 0.4.8