Redundant nils in destructors

[the-Arioch]

destructor TZSheets.Destroy();
SetLength(FSheets, 0);
FSheets := nil;

Can empty dynarray be not-nil in FPC ?

[the-Arioch]

destructor TZStyles.Destroy();
SetLength(FStyles, 0);
FStyles := nil;

[the-Arioch]

destructor TXSLXZipHelper.Destroy(); - every line

---

destructor TZAttributes.Destroy();
begin
SetLength(FItems, 0);
FItems := nil;

destructor TZsspXMLWriter.Destroy();
setlength(FTags, 0) ;
FTags := nil;

destructor TZsspXMLReader.Destroy();
SetLength(FTags, 0);
FTags := nil;

[the-Arioch]

//Очищает массивы
procedure ZESClearArrays(var _pages: TZESaveIntArray; var _names: TZESaveStrArray);
begin
SetLength(_pages, 0);
SetLength(_names, 0);
_names := nil;
_pages := nil;
end;