rem: wstring newdesc(get_long_description(ver));
add: wstring newdesc(pkg.end() ? L"" : get_long_description(ver));
context:   void set_package(const pkgCache::PkgIterator &pkg,		   const pkgCache::VerIterator &ver)  {    wstring newdesc(get_long_description(ver));    fragment *frag=make_desc_fragment(newdesc);    fragment *tags=make_tags_fragment(pkg);    if(tags != NULL)      tags = fragf("%n%n%F", tags);    else      tags = fragf("");    fragment *untrusted_frag;    if(pkg.end() || ver.end())      untrusted_frag=NULL;    else      untrusted_frag=make_untrusted_warning(ver);    if(untrusted_frag == NULL)      set_fragment(fragf("%F%F", frag, tags));    else      set_fragment(fragf("%F%n%F%F", untrusted_frag, frag, tags));  }