Fix, the "unicode" builtin with multiple arguments could corrupt unicode strings.
Fix, the "unicode" builtin with multiple arguments could corrupt unicode strings.

This strangely doesn't show as a reference leak immediately, or at least
I couldn't test it, but the assumption that the used function returns a
reference is wrong according to code review.

kayhayen/Nuitka,tempbottle/Nuitka,wfxiang08/Nuitka,tempbottle/Nuitka,kayhayen/Nuitka,tempbottle/Nuitka,kayhayen/Nuitka,wfxiang08/Nuitka,tempbottle/Nuitka,kayhayen/Nuitka,wfxiang08/Nuitka,wfxiang08/Nuitka