const for ASN1_STRING_TABLE

Index: widgets/NewX509.cpp
--- widgets/NewX509.cpp.orig
+++ widgets/NewX509.cpp
@@ -332,7 +332,7 @@ void NewX509::setupExtDNwidget(const QString &s, QLine
 
 void NewX509::setupLineEditByNid(int nid, QLineEdit *l)
 {
-	ASN1_STRING_TABLE *tab = ASN1_STRING_TABLE_get(nid);
+	const ASN1_STRING_TABLE *tab = ASN1_STRING_TABLE_get(nid);
 	QValidator *validator = NULL;
 	QStringList info;
 
