Validate parser parameter to XML_SetAttlistDeclHandler

diff --git a/expat/lib/xmlparse.c b/expat/lib/xmlparse.c
index 548ec02a9a516ee93f1be63697a78dc7c618b6c3..29e68428d0256cfb5aed8e6e92a2f848515a0445 100644 (file)
--- a/expat/lib/xmlparse.c
+++ b/expat/lib/xmlparse.c
@@ -1595,7 +1595,8 @@ void XMLCALL
 XML_SetAttlistDeclHandler(XML_Parser parser,
                           XML_AttlistDeclHandler attdecl)
 {
-  attlistDeclHandler = attdecl;
+  if (parser != NULL)
+    attlistDeclHandler = attdecl;
 }
 
 void XMLCALL