BUG: vtkSlicerAnnotationModuleLogic: Fix incorrect call to JumpAllSlices

This issue was discovered while fixing the following warning:

/path/to/Slicer/Modules/Loadable/Annotations/Logic/vtkSlicerAnnotationModuleLogic.cxx:2613:72: warning: passing NULL to non-pointer argument 2 of ‘static void vtkMRMLSliceNode::JumpAllSlices(vtkMRMLScene, double, double, double, int, int, vtkMRMLSliceNode)’ [-Wconversion-null]
vtkMRMLSliceNode::JumpAllSlices(this->GetMRMLScene(), NULL, r, a, s);
^

From: Jean-Christophe Fillion-Robin <jchris.fillionr@kitware.com>

git-svn-id: http://svn.slicer.org/Slicer4/trunk@25792 3bd1e089-480b-0410-8dfb-8563597acbee