From f70b5b54657d9ef8bca77efe4d4a412dcfd19449 Mon Sep 17 00:00:00 2001
From: Matthias Kuhn <matthias@opengis.ch>
Date: Sat, 12 Aug 2017 20:10:51 +0200
Subject: [PATCH] Avoid crash

---
 src/core/geometry/qgscurve.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/core/geometry/qgscurve.h b/src/core/geometry/qgscurve.h
index 7e64d33bd063..b7133bf9ae89 100644
--- a/src/core/geometry/qgscurve.h
+++ b/src/core/geometry/qgscurve.h
@@ -145,8 +145,11 @@ class CORE_EXPORT QgsCurve: public QgsAbstractGeometry
      */
     inline const QgsCurve *cast( const QgsAbstractGeometry *geom ) const
     {
+      if ( !geom )
+        return nullptr;
+
       QgsWkbTypes::Type type = geom->wkbType();
-      if ( geom && QgsWkbTypes::geometryType( type ) == QgsWkbTypes::LineGeometry && QgsWkbTypes::isSingleType( type ) )
+      if ( QgsWkbTypes::geometryType( type ) == QgsWkbTypes::LineGeometry && QgsWkbTypes::isSingleType( type ) )
       {
         return static_cast<const QgsCurve *>( geom );
       }