Fix "use strict" errors

[chtheis]

Some fixes where undeclared variables are used which is not allowed under "use strict"

[codecov-commenter]

Codecov Report

Merging #294 into master will not change coverage.
The diff coverage is n/a.

@@            Coverage Diff            @@
##             master     #294   +/-   ##
=========================================
  Coverage     96.16%   96.16%           
  Complexity      920      920           
=========================================
  Files            56       56           
  Lines          2320     2320           
  Branches        369      369           
=========================================
  Hits           2231     2231           
  Misses           48       48           
  Partials         41       41           

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[tntim96]

Hi @chtheis , sorry for not following up on this sooner. I believe this has been fixed in #311 , commit 0eca598. Can you confirm?

[tntim96]

This is a fix for #293

[tntim96]

Fixed in #311 , commit 0eca598