fixed warning and deprecated errors

conlite/classes/class.article.php

@@ -283,7 +283,7 @@ class Article extends Item
      */
     public function getContent($type, $id = NULL)
     {
-        if ($type == '') {
+        if (empty($type)) {
             return 'Class ' . get_class($this) . ': content-type must be specified!';
         }
 
@@ -295,7 +295,7 @@ class Article extends Item
 
         if (is_null($id)) {
             // return Array
-            return $this->content[$type];
+            return (empty($this->content[$type]))?'':$this->content[$type];
         }
 
         // return String

conlite/plugins/chains/createmetatags/classes/class.metatag.creator.html5.php

@@ -225,7 +225,7 @@ class MetaTagCreatorHtml5 {
      * @return boolean
      */
     protected function _addFacebookMetaTags() {
-        if(!$this->_aConfig['add_facebook_meta']) return;
+        if(empty($this->_aConfig['add_facebook_meta'])) return;
         // add always article data, cause they needed for fb-meta
         if($this->_aConfig['add_article_meta'] === false) {
             $this->_aConfig['add_article_meta'] = true;