Segfaults in certain cases

[jasonmay]

Segmentation fault (core dumped)

The process segfaults after 30-60 minutes of termcasting. I'll probably valgrind this sucker sometime and just work in it for some time until it happens again. Maybe buffer related?

[jasonmay]

Found two occurrences that I defend for in e65adff but there are a few more related to the state callbacks. Unfortunately, the pointer isn't NULL and I'm not sure how the pointer value is changing. I'm no C expert, but it would be nice to detect ahead of time to see if callbacks is going to fault with invalid access.