Test case 85020

Description

CWE: 191 Integer Underflow
BadSource: fscanf Read data from the console using fscanf()
GoodSource: Set data to a small, non-zero number (negative two)
Sinks: multiply
GoodSink: Ensure there will not be an underflow before multiplying data by 2
BadSink : If data is negative, multiply by 2, which can cause an underflow
Flow Variant: 52 Data flow: data passed as an argument from one function to another to another in three different source files