fixed memory bytes

[sk.syed2]

> Linux (compiler actually) supports C99 fixed-width types such as 8,
> 16, 32, 64 bits.
> Just look through the include/linux/types.h
> and small example here:
> http://lxr.linux.no/#linux+v2.6.36/arch/powerpc/boot/types.h#L8
>>

while writing portable applications always remember that "unsigned
long" is the size of pointer and not necessarily unsigned int.

For example on x86_64 sizeof(unsigned int) != sizeof(void *).

-syed