bug: obs_seq.final formatting inconsistencies across compilers on Gust

[mjs2369]

Original discussion and more info on the bug can be found on issue #470

Describe the bug

1. List the steps someone needs to take to reproduce the bug.
   Compiling and running filter with cce and Intel on Derecho/Gust.

2. What was the expected outcome? Outputs to obs_seq.final are identical for both compilers.

3. What actually happened?
   The cce compiler produces an output of 2*-1 rather than -1 -1 (for intel and ifx)

Error Message

N/A

Which model(s) are you working with?

All models.

Screenshots

see issue #470

Version of DART

Which version of DART are you using? v10.7.2

Have you modified the DART code?

No

Build information

Please describe:

1. The machine you are running on (e.g. windows laptop, NCAR supercomputer Cheyenne).
2. The compiler you are using (e.g. gnu, intel).

Compiling with cce on Derecho/Gust