Image.__repr__ raises AttributeError when Image is constructed with no arguments

[att14]

ipdb> Image()
*** TypeError: 'NoneType' object has no attribute '__getitem__'

The offending statement is self.signiture[:7].

Either Image should not be allowed to take 0 arguments or __repr__ should handle this correctly.

[dahlia]

Strange. I think the constructor should raise TypeError when there are no given arguments.

[emcconville]

Is this still an issue? I have a feeling this was addressed in a previous release.

>>> i = Image()
>>> repr(i)
'<wand.image.Image: (empty)>'
>>> Image()
<wand.image.Image: (empty)>

[emcconville]

Yep. Fixed with #265 with 2edc311. Closing.