[Magick-bugs] Incorrect error message from montage on 0 byte files

[Nick Burch]

Hi

montage seems to give you an incorrect error message if you try to join only 0 
byte files, eg:

 	# touch foo1.jpg
 	# touch foo2.jpg
 	# montage foo1.jpg foo2.jpg out.jpg
 	montage: missing an image filename `out.jpg'.

If the first file isn't 0 bytes, it behaves

 	# cp /some/real/jpg foo1.jpg
 	# touch foo2.jpg
 	# montage foo1.jpg foo2.jpg out.jpg
(the above behaves)

Nick