some improvements in PHP 7.3 compatability

attributes/fileset/controller.php

@@ -1,4 +1,4 @@
-<?php
+<?php
 namespace Concrete\Package\ThemeSupermint\Attribute\Fileset;
 
 defined('C5_EXECUTE') or die(_("Access Denied."));
@@ -24,11 +24,11 @@ public function form() {
 			$selected = 0;
 		}
 
-		if (count($input))
+		if (!isnull($input) && count($input))
 			print Loader::helper('form')->select($this->field('value'), $input,$selected);
 		else
 			echo t('No file sets found.');
 
-	}
+	}
 
-}
+}

blocks/autonav/templates/supermint_dropdown.php

@@ -89,7 +89,7 @@
 		endif;
 
 		// Maintenant on va déterminer les classes pour le dropdown
-		if($ni->cObj->getAttribute('display_multi_columns_drop') || count($ni->blocks)) :
+		if($ni->cObj->getAttribute('display_multi_columns_drop') || (is_array($ni->blocks) && count($ni->blocks))) :
 			// On prend la valeur de l'option full_width_mega ou si on est en multicolumn, l'option full_width_multicolumn
 			if($ni->cObj->getAttribute('display_multi_columns_drop'))
 				$ni->full_width_mega =  $o->full_width_multicolumn;

src/Helper/Upgrade.php

@@ -25,7 +25,7 @@ function upgradePageListTemplates () {
           if ($block->getBlockTypeHandle() == 'page_list') {
             $templateName = $block->getBlockFilename();
             preg_match("/supermint_(\w+)_(\w+)\.php/",$templateName,$matches);
-            if (count($matches)) {
+            if (is_array($matches) && count($matches)) {
               if ($matches[1] == 'carousel') $this->setBlockClass($block,'is-carousel',$matches[2]);
               if ($matches[1] == 'static' && $matches[2] == 'block') $this->setBlockClass($block,'',$matches[2]);
               if ($templateName == 'supermint_recent_post.php') $this->setBlockClass($block,'1-column',false);