global -u can't parse file path with spaces.

[yun sheng]

What is your environment(OS)?
Windows XP SP3

Which version of GLOBAL are you using?
GLOBAL 6.2.8 Win32

What did you do? (command line)
1, generate gtags for a project which path contains spaces
    C:\sheng yun\project
2, run global -u

What did you expect from it?
The gtags database should be updated.

What was occurred?
the database was not updated because of the spaces in the path.
And the following error occured:

`gtags: directory 'c:/sheng' not found.`


Best regards,
Sheng Yun