fix markdown class

lib/markdown.php

@@ -1718,7 +1718,7 @@ class MarkdownExtra_Parser extends Markdown_Parser {
       "doAbbreviations"    => 70,
       );
     
-    parent::Markdown_Parser();
+    parent::__construct();
   }
   
   
@@ -2950,4 +2950,4 @@ negligence or otherwise) arising in any way out of the use of this
 software, even if advised of the possibility of such damage.
 
 */
-?>
+?>