Do not force inclusion of control point

This reverts commit dae9d02.

src/core/geometry/qgsgeometryutils.cpp

@@ -762,6 +762,7 @@ void QgsGeometryUtils::segmentizeArc( const QgsPoint &p1, const QgsPoint &p2, co
     {
       addP2 = false;
     }
+    addP2 = false;
 
     // As we're adding the last point in any case, we'll avoid
     // including a point which is at less than 1% increment distance