These tests succeed on Wine if you run them from a volume for which GetDriveType
returns something other than DRIVE_FIXED, e.g. a ramdisk.

Avoids accessing uninitialized memory when the TextStyle table is absent.

ntdll: Set the IdleTime member from the SystemPerformanceInformation info class in NtQuerySystemInformation.

Translation by Rajesh Ranjan.

Also some code clean up.