1.0.3dev: don't pass an iterable instance to `RequestDone` to avoid SEGVs when downloading content of Subversion node (closes #11805)


git-svn-id: http://trac.edgewall.org/intertrac/log:/branches/1.0-stable@13243 af82e41b-90c4-0310-8c96-b1721e28e2e2