[timing] Loader compiles. Writer: not yet.

src/JsonUtil.h

@@ -31,6 +31,15 @@ namespace JsonUtil
 		for(unsigned i=0; i<v.size(); i++)
 			fn(*v[i], root[i]);
 	}
+	
+	template<class T>
+	static void SerializeVectorPointers(const vector<const T*> &v, void fn(const T *, Json::Value &), Json::Value &root)
+	{
+		root = Json::Value(Json::arrayValue);
+		root.resize(v.size());
+		for(unsigned i=0; i<v.size(); i++)
+			fn(*v[i], root[i]);
+	}
 
 	template<typename V, typename T>
 	static void SerializeArray(const V &v, void fn(const T &, Json::Value &), Json::Value &root)

src/TimingSegments.h

@@ -19,6 +19,7 @@ enum TimingSegmentType
 	SEGMENT_SCROLL,
 	SEGMENT_FAKE,
 	NUM_TimingSegmentType,
+	TimingSegmentType_Invalid,
 };
 
 const RString& TimingSegmentTypeToString( TimingSegmentType tst );
@@ -76,7 +77,10 @@ struct TimingSegment
 	 * @return the starting beat. */
 	float GetBeat() const;
 	
-	virtual TimingSegmentType GetType() const = 0;
+	virtual TimingSegmentType GetType() const
+	{
+		return TimingSegmentType_Invalid;
+	}
 	
 	/**
 	 * @brief Compares two DrivedSegments to see if one is less than the other.