Make setting a FileInfo mask apply the mask on the current info
Make setting a FileInfo mask apply the mask on the current info

Original git commit by Alexander Larsson <alexl@redhat.com> at 1187866520 +0200

svn path=/trunk/; revision=768

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