Plugin can't open Files which are in Directories that have a special character in their name

[GoogleCodeExporter]

What steps will reproduce the problem?

1. having a file in the directory "C:\...\Desktop\StuffÄ\shirt.dds"
2. trying to open that file via Gimp
3. Error Message

What is the expected output? What do you see instead?

The image doesn't open because it has file path with an special character (in 
the example the german letter "Ä").

What version of the product are you using? On what operating system?

Gimp 2.8.4
Win 7 Professional 64 Bit
Plugin Version 3.0.1

Please provide any additional information below.

n/a

Original issue reported on code.google.com by [email protected] on 21 Oct 2014 at 7:29