2013-01-28  Patrick Eriksson  <patrick.eriksson@chalmers.se>

            * arts-2-1-469

            * controlfiles/general/agendas.arts: Adopted definition of
            ppath_agenda__TransmitterReceiverPath.

            * src/m_ppath.cc (ppathFromRtePos2): Now switched to use new
              version
              of the method. (Old version deleted)

              * src/m_transmitter.cc (iyRadioLink): Now also accepting
                "unvalid"
                ppaths. This gives iy=NaN.

                * src/ppath.cc (ppath_set_background,ppath_what_background):
                Defined string for case 0 to be "unvalid" (before just "").

                * src/lin_alg.cc: Added type casting where dividing with an
                  integer
                  number.



git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@8147 aaf1aab0-4228-0410-ad68-8dceda47f409