Closed bug #2226. Thanks to Vladimir Chalupecky.

git-svn-id: http://www.openvolumemesh.org/svnrepo/OpenVolumeMesh/trunk@281 66977474-1d4b-4f09-8fe9-267525286df2

src/OpenVolumeMesh/Core/GeometryKernel.hh

@@ -44,6 +44,7 @@
 #define GEOMETRYKERNEL_HH_
 
 #include <cassert>
+#include <iostream>
 
 #include "../Geometry/VectorT.hh"
 #include "TopologyKernel.hh"