Fix ungroup.

Normand Briere

2019-06-29 a69bb4474a3264a9a7a7f8b8d8154ea771f167c8

 cRadio.java
..
..
@@ -38,6 +38,9 @@
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     byte[] graphs[] = new byte[10000][];
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     int undoindex = 0;
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+    // Patch to avoid bug with transparency.
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+    boolean hadMaterial;
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+    
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     Object3D object;
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     Camera camera;
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     cButton layout;