Value: place nocmp zero-sized field first

[eNV25]

Before opening your pull request, please make sure that you've:

• updated the changelog if the change is user-facing;
• added tests to cover your changes;
• run the test suite locally (make test); and finally,
• run the linters locally (make lint).

Lint runs go generate, which changes copyright years. I chose to not add those to keep the diff small.

[codecov]

Codecov Report

Merging #109 (57e8e3f) into master (f9aa9cb) will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##            master      #109   +/-   ##
=========================================
  Coverage   100.00%   100.00%           
=========================================
  Files           20        20           
  Lines          201       201           
=========================================
  Hits           201       201           

📣 Codecov can now indicate which changes are the most critical in Pull Requests. Learn more

[abhinav]

We originally chose to do this the other way around because of this guidance in our style guide, but I think it's okay to say that nocmp is a special case so this is okay.