Sets the size of a file or alternate stream.
cbdrive.setFileSize(fileName, size, password, [callback])
The 'callback' parameter specifies a function which will be called when the operation completes (or an error is encountered). If the 'callback' parameter is not specified, then the method will block and will not return until the operation completes (or an error is encountered).
The callback for this method is defined as:
'err' is the error that occurred. If there was no error, then 'err' is 'null'.
'err' has 2 properties which hold detailed information:
This method sets the size of the file or alternate stream specified by FileName.
The value passed for FileName must be a vault-local absolute path.
The Size parameter specifies the new size of the file or alternate stream, which must be greater than or equal to 0.
Note: This method can only be called when Active is true, and cannot be called within events.