Wrong exercise number listed for ex1

[greenyouse]

Hi, thanks for all the work putting this together!

I started working through the first chapter and saw a potential typo on pages 24-25 in the "Breaking It Down" section. The text references ex5.c:1 but I think it should have said ex1.c:1. The ex5.c file was referenced a few times for each line of code.

Is there an errata page for little things like this?