ftp: Fix refcounting of addresses when connecting
ftp: Fix refcounting of addresses when connecting

In error cases, we would get the refcounting wrong, which would lead to
a warning when finalizing the backend, because we carried around an
invalid pointer to an unreffed address for the whole time.

halfline/gvfs,xkahn/gvfs-cmis,gicmo/gvfs,gicmo/gvfs,gicmo/gvfs,philipl/gvfs,philipl/gvfs,halfline/gvfs,xkahn/gvfs-cmis,philipl/gvfs,cpatulea/gvfs,halfline/gvfs,cpatulea/gvfs,xkahn/gvfs-cmis,xkahn/gvfs-cmis,gicmo/gvfs