Fix backup saving when file already exists
Fix backup saving when file already exists

Original git commit by Alexander Larsson <alexl@redhat.com> at 1185360719 +0200

svn path=/trunk/; revision=713

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