Test case 85449

Description

CWE: 191 Integer Underflow
BadSource: fgets Read data from the console using fgets()
GoodSource: Set data to a small, non-zero number (negative two)
Sinks: sub
GoodSink: Ensure there will not be an underflow before subtracting 1 from data
BadSink : Subtract 1 from data, which can cause an Underflow
Flow Variant: 44 Data/control flow: data passed as an argument from one function to a function in the same source file called via a function pointer