'int' is enough for 'length' to migrate code from x86 to x64

[FrankLike via Digitalmars-d]

>>> but now ,'int' is enough for use,not huge and not small,only 
>>> enough.
>>> 'int' is easy to write,and most people are used to it.
>>> Most importantly easier to migrate code,if  'length''s return 
>>> value type is 'int'.

How about your idea?