Crash, Maternity custom value crash if nothing is entered.

[Katz007]

Edit: A save? you got it!

Message: Expected number for deltaT. Got: "NaN", typeof: number

Stack: 258/window.processTime@https://www.fenoxo.com/play/TiTS/backer/main.ac5ec763.js:1:11748035 zb@https://www.fenoxo.com/play/TiTS/backer/content_tavros.af938c88.js:1:3353843 Fb@https://www.fenoxo.com/play/TiTS/backer/content_tavros.af938c88.js:1:3354967 jb/<@https://www.fenoxo.com/play/TiTS/backer/content_tavros.af938c88.js:1:3354493 value@https://www.fenoxo.com/play/TiTS/backer/main.ac5ec763.js:1:10794039 47349/A

just click next without entering a number will crash cause is a error not a number.