Memory leak/Heap Corruption when using fatcat

[aarrbba123]

Build Info

Platform: Windows 10 / Cygwin
Compiler(s): Clang

Issue

When trying to get the info of a fat12 image, it threw a heap corruption error

So I went to debug it ...aaannnnd

(There's nothing wrong with the image file itself, even the root directory is correctly recognised by the program)

[aarrbba123]

Alr found the heap corruption part, i'll post the PR once I properly fix it

[aarrbba123]

Btw is using the heap nesessary, because you can't use sizeof() on heap arrays