Fix warnings reported by Intel ifort 19.1.3.

[KineticTheory]

Status

• Reference:
  • Pre-Merge Code Review
  • CDash Status
• Checks
  • Travis/Appveyor CI checks pass
  • Code coverage does not decrease
  • Valgrind test passes
  • Toss3 checks pass
  • Trinitite checks pass
  • Code reviewed/approved, sufficient DbC checks, testing, documentation

[codecov]

Codecov Report

Merging #1012 (085863d) into develop (1761272) will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           develop   #1012   +/-   ##
=======================================
  Coverage     94.0%   94.0%           
=======================================
  Files          368     368           
  Lines        17413   17413           
=======================================
  Hits         16381   16381           
  Misses        1032    1032           

[RyanWollaeger]

LGTM

[RyanWollaeger]

Will merge once Snow reports.

[KineticTheory]

Will merge once Snow reports.

The regressions on snow may be having issues. I'm looking into it.

(update) It looks like scratch3 is having issues.