Fix error when viewing public notes anonymously (bug#614681)
Fix error when viewing public notes anonymously (bug#614681)

s/request.user/author , since request.user could be None.

widox/snowy,jaredjennings/snowy,nekohayo/snowy,leonhandreke/snowy,GNOME/snowy,syskill/snowy,sandyarmstrong/snowy,jaredjennings/snowy,GNOME/snowy,leonhandreke/snowy,widox/snowy,nekohayo/snowy,NoUsername/PrivateNotesExperimental,syskill/snowy,NoUsername/PrivateNotesExperimental,jaredjennings/snowy,sandyarmstrong/snowy,jaredjennings/snowy