Fix getWidth()/getHeight(), so non-square grids work.

src/Grid.java

@@ -35,11 +35,11 @@ public class Grid {
     }
 
     public int getWidth() {
-        return _grid.length;
+        return _grid[0].length;
     }
 
     public int getHeight() {
-        return _grid[0].length;
+        return _grid.length;
     }
 
     public Patch getPatch(int x, int y) {

src/Render.java

@@ -248,7 +248,6 @@ public class Render extends Canvas implements Runnable, MouseListener,
     public void mouseMoved(MouseEvent e) {
     }
 
-    // Affects the algorithms menu
     @Override
     public void actionPerformed(ActionEvent event) {
         if ("pause".equals(event.getActionCommand())) {