Undefined behaviors and minor syntactic issues #57
Description
While using the challenges as part of NIST's SATE 6 tool evaluation, Frama-C identified some issues in a few challenges, mostly related to undefined behaviors (e.g. shift of negative values, read of uninitialized variables), but also a few typos, which do not correspond to the intended bugs in the challenges, indicating they seem to be accidental.
I compiled a partial report of the issues and reported them to NIST, which suggested to report them upstream.
Would you be interested in patches for them? If there is interest, I can submit pull requests to each item separately, so you can decide whether to take it into consideration. For instance, some programmers don't care about signed overflows, so you may decide not to merge those.