Merge pull request #73 from alikon/patch-1

postgresql  - error on pkg installation

src/com_weblinks/script.php

@@ -42,6 +42,7 @@ public function install($parent)
 			$category->params = '{"category_layout":"","image":""}';
 			$category->metadata = '{"author":"","robots":""}';
 			$category->language = '*';
+			$category->checked_out_time = JFactory::getDbo()->getNullDate();
 
 			// Set the location in the tree
 			$category->setLocation(1, 'last-child');