remove sparse check in vnd

[yamt%mwd.biglobe.ne.jp@localhost (YAMAMOTO Takashi)]

hi,

i'd like to remove the sparseness check in vnd because there's
no problem to use a sparse files on nfs.  dsl, is it ok?

YAMAMOTO Takashi


revision 1.205
date: 2009/12/06 16:33:18;  author: dsl;  state: Exp;  lines: +23 -3
Make vnd_size (the returned size) 64 bit, keeping old field for ioctl
compatibility. Both fields are now unsigned.
Add compatibility for the old ioctl size.
Detect and error files which are definitely sparse (va_bytes < va_size).
Part of fix for PR/41873.