Test run fail for NOIIAOC20TR

[TomasTorsvik]

I am extending the default BLOM system test suite to cover all pre-defined compsets. There run fails when testing NOIIAOC20TR, in mo_carchm.

103: forrtl: error (75): floating point exception
103: Image              PC                Routine            Line        Source             
103: cesm.exe           0000000004A6E2CB  Unknown               Unknown  Unknown
103: libc.so.6          000014A3C7454DB0  Unknown               Unknown  Unknown
103: cesm.exe           00000000043EE593  mo_carchm_mp_carc         985  mo_carchm.F90
103: cesm.exe           00000000043A5523  mo_carchm_mp_carc         454  mo_carchm.F90
103: cesm.exe           0000000003FFFC15  mo_hamocc4bcm_mp_         256  mo_hamocc4bcm.F90
103: cesm.exe           000000000367708F  mo_hamocc_step_mp          83  mo_hamocc_step.F90
103: cesm.exe           000000000357360A  mod_tracers_updat         163  mod_tracers_update.F90
103: cesm.exe           0000000002CA346B  mod_blom_step_mp_         230  mod_blom_step.F90
103: cesm.exe           0000000002C2EB2C  ocn_comp_nuopc_mp         910  ocn_comp_nuopc.F90

Line 985: subroutine carchm_solve_dicsat

ah2o = sqrt((K1*co2_sat)**2 + 4.*ac*2.*K1*k2*co2_sat)

It is strange that the NOIIAOC compset does not fail. The difference is

    <alias>NOIIAOC</alias>
    <lname>2000_DATM%IAF_SLND_CICE_BLOM%HYB%ECO_DROF%IAF_SGLC_SWAV</lname>
    ...
    <alias>NOIIAOC20TR</alias>
    <lname>20TR_DATM%IAF_SLND_CICE_BLOM%HYB%ECO_DROF%IAF_SGLC_SWAV</lname>
    ...
    <entry id="RUN_STARTDATE">
    compset="20TR_DATM%IAF_SLND_CICE_BLOM%HYB%ECO_DROF%IAF_SGLC_SWAV">1700-01-01</value>