accountsettings: silent coverity warning 12884

We use f anyway, so if we are going to test if it's null we can as
well return
csync_owncloud: silent CID 12883
reconcile:  use the proper enum type

thankfully the value hapenned to be the same, but the type
is of CSYNC_FTW_..  and not CSYNC_VIO_FILE_TYPE
Detected by coverity (CID 12887)