The attached patch applies to:
    kget/kmainwidget.cpp
    kget/kmainwidget.h
    kget/transferlist.cpp
    kget/transferlist.h

When in Expert mode and trying to download a file that can not be saved because
of another file with the same name, give the file a new name that does not exist in the file system.

For example, the file foo.goo exists and you try to download another file named foo.goo, the file
will be given the new name foo.1.goo

Regards,
Seamus