Fix out of memory crash with TimeUnit.

Normand Briere

2018-12-21 dcda2c5fa15e63daad67f5720a2f726e34f8cd71

 timeflow/app/actions/TimeflowAction.java
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@@ -27,7 +27,7 @@
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 	}
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-    protected TFModel getModel()
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+    protected TimeflowModel getModel()
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     {
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     	return app.model;
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     }