bugs in deletion

[suyangdong]

When delete a photo in the scrollview, and then scroll to the next one, you will find the photo is repeated in the next frame.
Reason:
The program thought the next frame is still valid so doesn't bother to reload:
if (NO == [currentPhotoView isKindOfClass:[KTPhotoView class]]) {
...
}

Solution:
Modify UnloadPhoto as follows

• (void)unloadPhoto:(NSInteger)index removeOrReplace:(BOOL)remove;
  {
  if (index < 0 || index >= photoCount_) {
  return;
  }

  id currentPhotoView = [photoViews_ objectAtIndex:index];
  if ([currentPhotoView isKindOfClass:[KTPhotoView class]]) {
  [currentPhotoView removeFromSuperview];
  [photoViews_ replaceObjectAtIndex:index withObject:[NSNull null]];
  }

  if (remove) {
  [self unloadPhoto:index+1 removeOrReplace:FALSE];
  }
  }

The only case that removeOrReplace is true is when deletion.