Failed to run git-cola if the PATH environment variable contains non-ASCII characters

[Vdragon]

Reproduce steps

1. $ make prefix=軟體/git-cola install
2. $ PATH=$PATH:$(pwd)/軟體/git-cola/bin
3. $ git cola

Expected result

git-cola launches normally

Current result

git-cola fails with following output:

Traceback (most recent call last):
  File "/usr/bin/git-cola", line 359, in <module>
    sys.exit(main())
  File "/usr/bin/git-cola", line 71, in main
    return args.func(args)
  File "/usr/bin/git-cola", line 213, in cmd_cola
    context = application_init(args)
  File "/usr/share/git-cola/lib/cola/app.py", line 257, in application_init
    setup_environment()
  File "/usr/share/git-cola/lib/cola/app.py", line 81, in setup_environment
    compat.setenv('PATH', path)
  File "/usr/share/git-cola/lib/cola/compat.py", line 32, in setenv
    os.environ[key] = value
  File "/usr/lib/python2.7/os.py", line 471, in __setitem__
    putenv(key, item)
UnicodeEncodeError: 'ascii' codec can't encode characters in position 239-240: ordinal not in range(128)

Environment

git-cola

commit 90b70d2

OS

Ubuntu 14.04LTS x86 64bit

Python

2.7.5 from Ubuntu repo

Locale

zh_TW.UTF-8

[davvid]

I typod the closes line. This was actually fixed in 3084fe2