change error to warnings in computing phase offset

macro

! =====================================

! test for masking tau and phase offset

! =====================================

clear data

set ns 1e-9

set A  1e-10

bins  pix  nbins  16

bins  tof  custom  4 14 25 38

histo tau nbins 30 min 0.05*ns max 50*ns log

histo q   nbins  2 min 0.03/A max 0.07/A

datapath /SNS/NSE/IPTS-25952

read s10190.echo as res !  8A Q=0.050

match all

fit res

read s10556.echo as sam !  8A Q=0.050!

match all

! here masking produces warning

mask tau set 2 run 10556

fit   sample flag offset phase_offset 180.0

!collect 

! here masking works

! mask tau set 2 run 10556

!collect

          enddo dtxpd

          if(ssq_norpix == 0d0 .or. ssq_norpix >= HUGE(1d0)) then

            call msg_error('get_phase_offset','phase offset determination failed ('&

            call msg_warning('get_phase_offset','phase offset determination failed ('&

!                    //trim(msg_fmt("('ssq normalization: ', g9.5)", ssq_norpix))//')' &

                    //'Check: r-parameters r.ave_min, r.fqt_min or r.fqt_maxsigma !)')

            djoffset = 0