Potential error in find_new_objs

[noelshin]

First of all, thank you very much for making this code publicly available!

While I was using your code, I noticed that in the find_new_objs function in SegTracker.py (https://github.com/z-x-yang/Segment-and-Track-Anything/blob/main/SegTracker.py#L123) could have an issue regarding modification of new_obj_mask during iteration. In addition, as pointed out in #105, shouldn't obj_num be self.curr_idx + 1 rather than self.curr_idx? Please correct me if I'm mistaken.

Many thanks,
Gyungin