Fixed possible array out of bounds in the BoardEditor swipe away.

The lib seems to have a bug or something, do bounds checking.

Clover/src/org/floens/chan/ui/activity/BoardEditor.java

@@ -97,10 +97,12 @@ public class BoardEditor extends Activity {
                     @Override
                     public void onDismiss(ListView listView, int[] reverseSortedPositions) {
                         for (int position : reverseSortedPositions) {
+                            if (position >= 0 && position < adapter.getCount()) {
                                 Board b = adapter.getItem(position);
                                 adapter.remove(b);
                                 b.saved = false;
                             }
+                        }
 
                         adapter.notifyDataSetChanged();
                     }