[496466] Fix NPE

Since commit [1], there is a potential NPE, for example in deprecated
"old UI" mode (used in some tests).

[1]
http://git.eclipse.org/c/sirius/org.eclipse.sirius.git/commit/?id=1dcd33112221bba76fdc3f9a3657deb1dd00d5a6

Bug: 496466
Change-Id: I505add5d62b003c1f053094eaea9453eb62f97e9
Signed-off-by: Laurent Redor <laurent.redor@obeo.fr>

1 files changed, 3 insertions, 1 deletions

diff --git a/plugins/org.eclipse.sirius.diagram.ui/src-diag/org/eclipse/sirius/diagram/ui/tools/internal/actions/layout/CopyFormatAction.java b/plugins/org.eclipse.sirius.diagram.ui/src-diag/org/eclipse/sirius/diagram/ui/tools/internal/actions/layout/CopyFormatAction.java
index b5f3720cdb..6f01a3df5a 100644
--- a/plugins/org.eclipse.sirius.diagram.ui/src-diag/org/eclipse/sirius/diagram/ui/tools/internal/actions/layout/CopyFormatAction.java
+++ b/plugins/org.eclipse.sirius.diagram.ui/src-diag/org/eclipse/sirius/diagram/ui/tools/internal/actions/layout/CopyFormatAction.java
@@ -164,7 +164,9 @@ public class CopyFormatAction extends AbstractCopyPasteFormatAction {
                         IEditorPart editor = ref.getEditor(false);
                         if (editor instanceof DDiagramEditorImpl) {
                             DDiagramEditorImpl diagramEditor = (DDiagramEditorImpl) editor;
-                            diagramEditor.getTabbar().reinitToolBar(diagramEditor.getDiagramGraphicalViewer().getSelection());
+                            if (diagramEditor.getTabbar() != null) {
+                                diagramEditor.getTabbar().reinitToolBar(diagramEditor.getDiagramGraphicalViewer().getSelection());
+                            }
                         }
                     }
                 }