[PATCH] ntdll: Use correct size when checking iosb in NtFlushBuffersFile. (coverity)

[Jacek Caban]

Spotted by Nikolay.

Signed-off-by: Jacek Caban 
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 dlls/ntdll/file.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)