clang-analyzer_unity warnings for Arx in branch master

• -Wnan-infinity-disabled [docs] (0 | -5)
• core.uninitialized.Branch (1 | =)
• unix.Errno (1 | =)
• unix.Malloc (1 | =)
• core.NullDereference (2 | =)
• core.UndefinedBinaryOperatorResult (2 | =)
• unix.StdCLibraryFunctions (2 | =)
• core.uninitialized.Assign (3 | =)
• deadcode.DeadStores (4 | =)
• core.CallAndMessage (6 | =)