Use triple-equals in a few more places

models/AssetIterator.php

@@ -56,7 +56,7 @@ class AssetIterator extends Asset
 		// Reset internal pointer for next asset.
 		$this->db->data_seek($this->res_thumbs, 0);
 
-		if ($this->return_format == 'object')
+		if ($this->return_format === 'object')
 			return new Asset($row);
 		else
 			return $row;