minor fix for possible error when treatment data is missing

[jasoncalabrese]

No description provided.

[codecov-io]

Current coverage is 82.73%

Merging #786 into dev will increase coverage by +0.42% as of 2163121

@@              dev    #786   diff @@
=====================================
  Files          55      56     +1
  Stmts        3516    3631   +115
  Branches        0       0       
  Methods         0       0       
=====================================
+ Hit          2894    3004   +110
  Partial         0       0       
- Missed        622     627     +5

Review entire Coverage Diff as of 2163121

---

Uncovered Suggestions

1. +0.39% via lib/mqtt.js#128...141
2. +0.33% via lib/mqtt.js#292...303
3. +0.28% via ...oluswizardpreview.js#219...228
4. See 7 more...

Powered by Codecov. Updated on successful CI builds.

[codecov-io]

Current coverage is 82.31%

Merging #786 into dev will not affect coverage as of 4741f74

@@              dev    #786   diff @@
=====================================
  Files          55      55       
  Stmts        3516    3517     +1
  Branches        0       0       
  Methods         0       0       
=====================================
+ Hit          2894    2895     +1
  Partial         0       0       
  Missed        622     622       

Review entire Coverage Diff as of 4741f74

---

Uncovered Suggestions

1. +0.40% via lib/mqtt.js#128...141
2. +0.35% via lib/mqtt.js#292...303
3. +0.29% via ...oluswizardpreview.js#219...228
4. See 7 more...

Powered by Codecov. Updated on successful CI builds.