type of sadb_x_kmprivate_reserved in pfkeyv2.h

Hi David and folks,

In include/linux/pfkeyv2.h, is the type 'u_int32_t' for 
sadb_x_kmprivate_reserved intentional or just an error while bringing in 
the PF_KEY IPsec extensions from KAME?

struct sadb_x_kmprivate {
        uint16_t        sadb_x_kmprivate_len;
        uint16_t        sadb_x_kmprivate_exttype;
        u_int32_t       sadb_x_kmprivate_reserved;    <====
} __attribute__((packed));

This is causing erroneous ipsec-tools builds. How does the 
__BIT_TYPES_DEFINED define work? Seems like u_int32_t does not get 
defined in include/linux/types.h when building a userland program such 
as ipsec-tools.

An easy fix is to change the type to uint32_t. Patch attached.

Thanks.
- Tushar