Resolve #3508988 "Average function not"

Closes #3508988

added 5 commits

• 768ea8b6...ef653008 - 3 commits from branch project:4.0.x
• ff876a0a - Issue #3508988 by tr: Average function not protected against the case of 0 votes
• 311d8c26 - Add comment to the Count function while we're at it

Compare with previous version

merged