[467649] Avoid potential NPE on SessionEditorInput

Avoid potential NPE on SessionEditorInput when session is closed.

Bug: 467649
Change-Id: Id98b9f872f521c3e9ba34fd9a046fc10c538f843
Signed-off-by: Esteban Dugueperoux <esteban.dugueperoux@obeo.fr>
1 file changed