[Bug-wget] FTP download using incorrect size for "Length" with -c

[Jozua]

Hi.

When continuing a ftp download, an incorrect value is used for the total 
file size.
The SIZE command returns the correct size, but the value used comes from 
the response to the RETR command, which (at least in this case) is the 
number of bytes remaining after REST. (See below for more info).

The bug seems to be introduced by the line :
    expected_bytes = ftp_expected_bytes (ftp_last_respline);
in src/ftp.c (line 1022)

Commenting out that line seems to fix the bug, but i have no idea how it 
will affect things if the server does not support the SIZE command.

wget version : 1.12
server : ProFTPD 1.3.1

wget output:

--2010-07-12 21:54:05-- 
ftp://ftp.is.co.za/linux/distributions/fedora/linux/releases/13/Fedora/x86_64/iso/Fedora-13-x86_64-DVD.iso
           => `Fedora-13-x86_64-DVD.iso'
Resolving ftp.is.co.za (ftp.is.co.za)... 196.4.160.12
Connecting to ftp.is.co.za (ftp.is.co.za)|196.4.160.12|:21... connected.
Logging in as anonymous ... Logged in!
==> SYST ... done.    ==> PWD ... done.
==> TYPE I ... done.  ==> CWD (1) 
/linux/distributions/fedora/linux/releases/13/Fedora/x86_64/iso ... done.
==> SIZE Fedora-13-x86_64-DVD.iso ... 3630045184
==> PASV ... done.    ==> REST 974535680 ... done.
==> RETR Fedora-13-x86_64-DVD.iso ... done.
Length: 2655517712 (2.5G), 1680973824 (1.6G) remaining (unauthoritative)

FTP conversation

TYPE I
200 Type set to I
CWD /linux/distributions/fedora/linux/releases/13/Fedora/x86_64/iso
250 CWD command successful
SIZE Fedora-13-x86_64-DVD.iso
213 3630045184
PASV
227 Entering Passive Mode (196,4,160,12,221,246).
REST 974527472
350 Restarting at 974527472. Send STORE or RETRIEVE to initiate transfer
RETR Fedora-13-x86_64-DVD.iso
150 Opening BINARY mode data connection for Fedora-13-x86_64-DVD.iso 
(2655517712 bytes)