fixes: step error and min/max args

[rgknox]

Description:

This PR fixes the types of a 0's and 1's passed to the temperature dependence scaler on frost mortality. We also update in-code documentation on intercellular co2, and leaf-to-sapwood area parameter.

Collaborators:

See #389 and #390
Gordon Bonan, @everpassenger

Expectation of Answer Changes:

This will change answers slightly, but probably not in the regression tests.

Checklist:

• My change requires a change to the documentation.
• I have updated the in-code documentation AND wiki accordingly.
• I have read the CONTRIBUTING document.
• FATES PASS/FAIL regression tests were run
• If answers were expected to change, evaluation was performed and provided

Test Results:

FATES-CLM (or) HLM test hash-tag:

FATES-CLM (or) HLM baseline hash-tag:

CTSM: 19f887d FATES: 14aeb4f

FATES baseline hash-tag:

Test Output:

All PASS (compare as well)

[ckoven]

looks pretty straightforward and good to me. thanks @rgknox!

[rgknox]

Added corrections to the comments and meta-data for the "latosa" (leaf-area-to-sapwood-area) parameters, which were incorrectly labeled as "m2/cm2", the inverse of what it is "cm2/m2".
This was identified by Gordon Bonan.

[rosiealice]

Nice!

[rgknox]

@everpassenger , can you review the changes added in the last commit please?

[everpassenger]

The changes of names from "intra" to "inter" look good to me. Thanks