Fix Red Hat bugzilla bug : https://bugzilla.redhat.com/show_bug.cgi?id=516165

Fix Red Hat bugzilla bug : https://bugzilla.redhat.com/show_bug.cgi?id=516165
nautilus fails to copy files from an SMB share. This is a show-stopper
for 3.4.1. Although gnome-vfs is doing *incredibly* stupid things by asking
for a read size of 65535 - this translates on the wire to a 65534 byte read
followed by a 1 byte read. Please send this back to the gnome developers that
they will ge horrid on the wire performance for this.
Jeremy.

Fixes bug #6649.

Fixed in master with commit 33d27797d3ae9ab3ff7e1aa940941cc450f5ad1d.
(cherry picked from commit ef891070288cd13aff7c730de7c1baf54dddb90f)