Fix "+" issue

Normand Briere

2019-06-09 3ae9b1de47e51e7c150412f2bb14383cb6a5f8f8

 PhysicsEditor.java
..
..
@@ -190,6 +190,7 @@
190
190
 	
191
191
 	void Refresh()
192
192
 	{
193
+                new Exception().printStackTrace();
193
194
             System.exit(0);
194
195
 		System.out.println("Biparam :: Refresh");
195
196
         physicsnode.gravity = (float)gravityField.getFloat(); // biparam.minUDivs, 99);