Fix ungroup.

Normand Briere

2019-06-29 a69bb4474a3264a9a7a7f8b8d8154ea771f167c8

 GroupLeaf.java
..
..
@@ -14,7 +14,12 @@
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     GroupLeaf()
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     {
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-        super("GroupLeaf");
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+        this("Loop");
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+    }
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+
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+    GroupLeaf(String name)
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+    {
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+        super(name);
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         addChild(new cGroup("Leaf"));
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     }