lseek() does not allow seeking past EOF

[mrpapersonic]

According to POSIX.1:

The lseek() function shall allow the file offset to be set beyond the end of the existing data in the file. If data is later written at this point, subsequent reads of data in the gap shall return bytes with the value 0 until data is actually written into the gap.

A simple fix should be to use GetEOF and SetEOF to change the logical EOF and set the position accordingly.