Patch by Tim Edwards <tkedwards@optusnet.com.au>:
"While using KGet I've noticed that when the total size of all the files
being downloaded is over ~2gb (i.e the highest number in bytes that a
32-bit signed int can represent) it doesn't display the total size
correctly in the task bar."
(http://lists.kde.org/?l=kde-devel&m=108307479005468)

This is mostly replacing 'unsigned long' with 'KIO::filesize_t'.

CCMAIL: tkedwards@optusnet.com.au

svn path=/branches/KDE_3_2_BRANCH/kdenetwork/kget/; revision=306988