- Fix a couple of errors and warnings

app/widgets/Chat/Chat.php

@@ -50,7 +50,7 @@ class Chat extends WidgetBase {
         else {
             $rc = new \modl\ContactDAO;
             $contact = $rc->getRosterItem(echapJid($arr['jid']));
-            if($contact->chaton > 0 ) {
+            if(isset($contact) && $contact->chaton > 0 ) {
                 $html='
                     <div class="message presence">
                         <span class="date">' . date('G:i', time()) . '</span>' . prepareString(htmlentities($txt[$arr['presence']] . ' - ' . $arr['ressource'], ENT_COMPAT, "UTF-8")) . '

app/widgets/News/News.php

@@ -83,7 +83,7 @@ class News extends WidgetCommon {
                 <a class="button color green icon refresh"
                    onclick="'.$this->genCallAjax('ajaxRefresh').'"
                 >'.
-                    __('post.new_items', $count).' - '.__t('button.refresh').'
+                    __('post.new_items', $count).' - '.__('button.refresh').'
                 </a>';
                 
             RPC::call('movim_posts_unread', $count);

app/widgets/Wall/Wall.php

@@ -75,6 +75,8 @@ class Wall extends WidgetCommon
 
         $next = $start + 10;
         
+        $html = '';
+        
         if(count($pl) > 0 && $htmlmessages != false) {
             $wallhead = $this->tpl();
             $wallhead->assign('start', $start);