Add newline, even when bailing out

Please always add a newline. even when quitting abruptly.
```
00:43 tmp$ exif a.jpg|tail -n 2
Corrupt data
The data provided does not follow the specification.
ExifEntry: The tag 'GPSAltitudeRef' contains data of an invalid format ('Rational', expected 'Byte').
Longitude           |120, 43, 21.4399
Altitude Reference  |00:43 tmp$ 
```
$ exif --version
0.6.22