Fix in 8211

[caribou]

There's a bug in gdal/frmts/iso8211/ddfrecord.cpp probably due to changes. Somebody forgot to take out a ftell and fseek. I would replace :

486 long pos = ftell(fp) - rewindSize;

487 fseek(fp, pos, SEEK_SET);

by:

VSIFSeekL(fp, -rewindSize, SEEK_CUR);

http://trac.osgeo.org/gdal/browser/trunk/gdal/frmts/iso8211/ddfrecord.cpp#L486

[warmerdam]

Excellent point. I have patched it like this. For unfortunate reasons the vsi_l_offset type is normally unsigned so we can't actually use VSIFSeekL() properly to seek backwards using SEEK_CUR.

486,487c488,489
<         long pos = ftell(fp) - rewindSize;
<         fseek(fp, pos, SEEK_SET);
---
>         vsi_l_offset pos = VSIFTellL(fp) - rewindSize;
>         VSIFSeekL(fp, pos, SEEK_SET);

Change applied in 1.4.x and trunk.