The attached patch eliminates the many places where the rra_current pointer was maint...

The attached patch eliminates the many places where the rra_current pointer was maintained; the existing write/seek mechanisms update rrd_file->pos correctly.
Also, the seek at the front of process_arg is not necessary; write_to_rras will now take care to correct the file position at every update cycle.
This eliminates unnecessary rrd_seek() calls when MMAP is not enabled. -- kevin brintnall  kbrint rufus.net

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@1488 a5681a0c-68f1-0310-ab6d-d61299d08faa