[3.0dev] crash after redoing the creation of shapes

[arno_b]

Create 2 rectangles
undo
redo
modify the colour or translate the selection or anything else -> crash

 at net.sf.latexdraw.mapping.Shape2BorderMapping.onObjectModified(Shape2BorderMapping.java:18)
 at fr.eseo.malai.mapping.MappingRegistry.onObjectModified(MappingRegistry.java:301)
 at net.sf.latexdraw.glib.models.impl.LShape.setModified(LShape.java:1298)
 at net.sf.latexdraw.glib.models.impl.LGroup.setModified(LGroup.java:658)
 at net.sf.latexdraw.actions.TranslateShape.doActionBody(TranslateShape.java:64)
 at fr.eseo.malai.action.Action.doIt(Action.java:64)
 at fr.eseo.malai.instrument.Link.interactionStops(Link.java:229)

[arno_b (arno.b)]

Still here:
Create two rectangles.
Select them.
Rotate Them.
Undo rotation
undo creation
redo
redo
 => crash
Exception in thread "AWT-EventQueue-0" java.lang.NullPointerException
 at net.sf.latexdraw.mapping.Shape2BorderMapping.onObjectModified(Shape2BorderMapping.java:36)
 at fr.eseo.malai.mapping.MappingRegistry.onObjectModified(MappingRegistry.java:301)
 at net.sf.latexdraw.glib.models.impl.LShape.setModified(LShape.java:1302)
 at net.sf.latexdraw.glib.models.impl.LGroup.setModified(LGroup.java:658)
 at net.sf.latexdraw.actions.ModifyShapeProperty.applyValue(ModifyShapeProperty.java:199)
 at net.sf.latexdraw.actions.ModifyShapeProperty.redo(ModifyShapeProperty.java:65)
 at fr.eseo.malai.undo.UndoCollector.redo(UndoCollector.java:133)
 at fr.eseo.malai.action.Redo.doActionBody(Redo.java:50)
 at fr.eseo.malai.action.Action.doIt(Action.java:64)
 at fr.eseo.malai.instrument.Link.interactionStops(Link.java:229)
 at fr.eseo.malai.interaction.Interaction.notifyHandlersOnStop(Interaction.java:117)
 at fr.eseo.malai.interaction.TerminalState.onIngoing(TerminalState.java:33)
 at fr.eseo.malai.interaction.StateMachine.executeTransition(StateMachine.java:150)
 at fr.eseo.malai.interaction.StateMachine.onButtonPressed(StateMachine.java:230)
 at fr.eseo.malai.interaction.SwingEventManager.actionPerformed(SwingEventManager.java:281)