Merge branch 'fix-plain-index' into 'release'

Fix divBy0 if all info columns are disabled

Hiding all information columns results in a division by zero.

See merge request !128

index.php

@@ -36,7 +36,7 @@ $pollService = new PollService($connect, new $logService());
 /* ---- */
 
 $demoPoll = $pollService->findById('aqg259dth55iuhwm');
-$nbcol = $config['show_what_is_that'] + $config['show_the_software'] + $config['show_cultivate_your_garden'];
+$nbcol = max( $config['show_what_is_that'] + $config['show_the_software'] + $config['show_cultivate_your_garden'], 1 );
 
 $smarty->assign('show_what_is_that', $config['show_what_is_that']);
 $smarty->assign('show_the_software', $config['show_the_software']);