handle condition definitions that don't have values

[rymorale]

Description

fix for issue: #630

Related Issue

Motivation and Context

How Has This Been Tested?

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• I have signed the Adobe Open Source CLA.
• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.

[codecov]

Codecov Report

Merging #632 (6c1c753) into dev-v3.1.4 (ccf4bb6) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@             Coverage Diff             @@
##           dev-v3.1.4     #632   +/-   ##
===========================================
  Coverage       85.30%   85.30%           
===========================================
  Files             104      104           
  Lines            4612     4613    +1     
===========================================
+ Hits             3934     3935    +1     
  Misses            678      678