Avoid `malloc` & `free` Usage

[aeoranday]

EmulationUnit can be formatted in a superior way that avoids the usage of malloc and free.

[ArturSztuc]

I see this is in v5.x.x.
@aeoranday I think a vector<char> or unique_ptr<char[]> would work here, but did you think of something specific?

[aeoranday]

I did not have something specific in mind, but smart pointers seem like a safer route to go.