From 27b43064b373d19cbce17f9fc73af4e9a2a8884b Mon Sep 17 00:00:00 2001
From: Nyall Dawson <nyall.dawson@gmail.com>
Date: Mon, 25 Sep 2017 12:39:44 +1000
Subject: [PATCH] Fix incorrect wkb type for compound curve when adding vertex
 to empty curve

---
 src/core/geometry/qgscompoundcurve.cpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/core/geometry/qgscompoundcurve.cpp b/src/core/geometry/qgscompoundcurve.cpp
index 0a70b12afb6..5bdd17190c1 100644
--- a/src/core/geometry/qgscompoundcurve.cpp
+++ b/src/core/geometry/qgscompoundcurve.cpp
@@ -436,7 +436,7 @@ void QgsCompoundCurve::removeCurve( int i )
 
 void QgsCompoundCurve::addVertex( const QgsPoint &pt )
 {
-  if ( mWkbType == QgsWkbTypes::Unknown )
+  if ( mCurves.isEmpty() || mWkbType == QgsWkbTypes::Unknown )
   {
     setZMTypeFromSubGeometry( &pt, QgsWkbTypes::CompoundCurve );
   }