* arts-2-3-97

Added lm_p_lim as a limit to pressure for line mixing. Default is 0.
This is because I encountered a problem with lblrtm line mixing
temperature grid at high altitude, where atmospheric temeprature is low.
Opted for workspace variable instead of linemixing variable by advice
from Oliver.  The other options were to make it part of abs_species 
or store limit per line, one of which is confusing, the other of which
is a waste of space.

* src/linemixingdata*: Changed so that each function that deals with line
mixing accepts pressure and pressure limit.  If pressure is lower than
pressure limit, then the line mixing output is set to zero, essentailly
ignoring it.

* the rest:  passing lm_p_lim to the right position.



git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@9112 aaf1aab0-4228-0410-ad68-8dceda47f409
* arts-2-3-98

* src/linerecord.cc (LineRecord::ReadFromArtscat5Stream, operator<<):

Don't store the number of elements for pressure broading and linemixing
inside the catalog. Use the ExpectedVectorLengthFromType instead.

git-svn-id: https://www.sat.ltu.se/svn/rt/arts/trunk@9113 aaf1aab0-4228-0410-ad68-8dceda47f409