Fixed unknown variable

Author: orronai

lms/static/checker.js

@@ -23,6 +23,5 @@ function trackFinished(exerciseId, solutionId, element) {
 }
 
 window.addEventListener('lines-numbered', () => {
-  const exerciseId = codeView.dataset.exercise;
-  trackFinished(exerciseId, window.solutionId, document.getElementById('save-check'));
+  trackFinished(window.exerciseId, window.solutionId, document.getElementById('save-check'));
 });

lms/static/comments.js

@@ -148,6 +148,7 @@ window.addEventListener('load', () => {
   const codeElementData = document.getElementById('code-view').dataset;
   window.solutionId = codeElementData.id;
   window.fileId = codeElementData.file;
+  window.exerciseId = codeElementData.exercise;
   sessionStorage.setItem('role', codeElementData.role);
   sessionStorage.setItem('solver', codeElementData.solver);
   sessionStorage.setItem('allowedComment', codeElementData.allowedComment);