run algorithm only when play is pressed

src/ui/view/GUI.java

@@ -1878,10 +1878,10 @@ public class GUI<E> implements CategoryListener {
 			@Override
 			public void stateChanged(ChangeEvent e) {
 				int i = model.getCurIteration();
-				controller.runAlgorithm(model, controller);
 				controller.calculateStateForTimeStep(i);
 				unitGraph.repaint();
 				if (model.getIsSimRunning()) {
+					controller.runAlgorithm(model, controller);
 					statSplitPane.repaintGraphs();
 				}
 				contentPane.updateUI();