App crashes in comprehension if time entered is 0.

[m-murad]

In comprehension template if the user enters time as 0 a toast is shown which says that time cannot be zero.
But if the user enters time as 00 or (0)^* the project is successfully compiled but the generated app crashes.

@opticod @croozeus
I am making a PR for this.

[archie94]

Hi @free4murad , I tried to reproduce this and yes the project is successfully compiled for time as 0(0)* .
Please note that in my case the generated app did not crash but we directly land on the question(s) section.

[m-murad]

@archie94
The simulator is crashing for time 0^0.
The generate app is not crashing but takes you directly to the questions.

[opticod]

Closed via #389