#8 du - wrong size on large folders

[Timothy Truckle]

du reports a wrong size on large folders.
eg:
real size (by dir /s): 3157 files(s) 6.024.951.124 Bytes
du -sh : 1,6G

[Yar Tikhiy]

Logged In: YES
user_id=384852

This bug seems to result from using 32-bit integer arithmetics
somewhere in du code. A 32-bit unsigned integer will overflow
at 2^32, that is about 4G.