From cf48e268e0c9445c33c594b255a71bdc9be1211d Mon Sep 17 00:00:00 2001
From: Dan Goodliffe <dan@randomdan.homeip.net>
Date: Sat, 23 Sep 2017 13:49:02 +0100
Subject: Add missing override for optional->optional conversion

---
 slicer/slicer/modelPartsTypes.impl.h | 1 +
 1 file changed, 1 insertion(+)

diff --git a/slicer/slicer/modelPartsTypes.impl.h b/slicer/slicer/modelPartsTypes.impl.h
index 2fe6401..38fdf2c 100644
--- a/slicer/slicer/modelPartsTypes.impl.h
+++ b/slicer/slicer/modelPartsTypes.impl.h
@@ -215,6 +215,7 @@ namespace Slicer {
 		template <typename Y>
 		IceUtil::Optional<T> operator()(Y & y) const { return y; }
 		static bool valueExists(const T &) { return true; }
+		static bool valueExists(const IceUtil::Optional<T> &) { return true; }
 	};
 
 	template<typename ET, typename MT, typename Conv>
-- 
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