Added cleanup routines, cleanup with -pedantic on linux, closed #3788, Daniel
diff --git a/include/libxml/tree.h b/include/libxml/tree.h
index f5fcf57..b6d030b 100644
--- a/include/libxml/tree.h
+++ b/include/libxml/tree.h
@@ -464,7 +464,7 @@
 					 const xmlChar *content,
 					 int len);
 xmlChar *	xmlNodeGetContent	(xmlNodePtr cur);
-const xmlChar *	xmlNodeGetLang		(xmlNodePtr cur);
+xmlChar *	xmlNodeGetLang		(xmlNodePtr cur);
 void		xmlNodeSetLang		(xmlNodePtr cur,
 					 const xmlChar *lang);