From b57dca66be8a0015e22018dac1c0e4dd3a6a510f Mon Sep 17 00:00:00 2001
From: Stuart Buchanan <stuart_d_buchanan@yahoo.co.uk>
Date: Fri, 13 Oct 2017 17:35:21 +0100
Subject: [PATCH] Handle case where no tranform matrix exists.

---
 simgear/canvas/elements/CanvasElement.cxx | 1 +
 1 file changed, 1 insertion(+)

diff --git a/simgear/canvas/elements/CanvasElement.cxx b/simgear/canvas/elements/CanvasElement.cxx
index 4fb3eab8..a8557a06 100644
--- a/simgear/canvas/elements/CanvasElement.cxx
+++ b/simgear/canvas/elements/CanvasElement.cxx
@@ -433,6 +433,7 @@ namespace canvas
   osg::Vec2f Element::posToLocal(const osg::Vec2f& pos) const
   {
     getMatrix();
+    if (! _transform) return osg::Vec2f(pos[0], pos[1]);
     const osg::Matrix& m = _transform->getInverseMatrix();
     return osg::Vec2f
     (