Change mach_read_int_type() to return an integer type (ullint) instead
of array of bytes that later needs to be converted to an appropriate
integer type.
Approved by: Sunny
Add __attribute__((const)) or __attribute__((pure)) to various
mach_read functions.
dtype_new_read_for_order_and_null_size(): Remove a statement
without effect: mach_read_from_2(buf + 4).
