Protect RC_TREE_MODEL::GetValue() against null pointer
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@ -378,7 +378,7 @@ void RC_TREE_MODEL::GetValue( wxVariant& aVariant,
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break;
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case RC_TREE_NODE::MAIN_ITEM:
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if( rcItem->GetParent()->GetMarkerType() == MARKER_BASE::MARKER_DRAWING_SHEET )
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if( rcItem->GetParent() && rcItem->GetParent()->GetMarkerType() == MARKER_BASE::MARKER_DRAWING_SHEET )
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{
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aVariant = _( "Drawing Sheet" );
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break;
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