[ros-svn] [hbirr] 18060: - Don't convert the device name, if the name is a NULL pointer (in QueryDosDeviceA).

[hbirr at svn.reactos.com]

- Don't convert the device name, if the name is a NULL pointer (in QueryDosDeviceA).  
- Convert the string in several steps, because the string may be longer than 32k characters (in QueryDosDeviceA).



Updated files:
trunk/reactos/lib/kernel32/file/dosdev.c