apply_ptr_cleanup optimization is buggy

[HPCguy]

This is the most powerful optimization in Squint, but is currently buggy due to some missing dependency checks.

Since this repository is a Work In Progress, and since all repository tests are passing, I am not going to disable apply_ptr_cleanup as I work to fix it.

To disable this optimization, go into squint.c and comment out the only call to the apply_ptr_cleanup function near the end of the file.