const for ASN1_STRING_TABLE

Index: lib/x509name.cpp
--- lib/x509name.cpp.orig
+++ lib/x509name.cpp
@@ -204,7 +204,7 @@ int x509name::getNidByName(const QString &nid_name)
 
 QString x509name::checkLength() const
 {
-	ASN1_STRING_TABLE *tab;
+	const ASN1_STRING_TABLE *tab;
 	int i, max = entryCount();
 	QString warn;
 
