add ip address  10.10.10.28/24

add 4 fibs:

1. address 10.10.10.28/32
2. connect  10.10.10.0/24
3. broadcast 10.10.10.255/32
4. martian   10.10.10.0/32

 in connetc fib structure  fp->fp_addr.ip4 is 0x1c0a0a0a

when dump fib ,will retun error data  10.10.10.28/24.

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show ip fib  is correct

ip4_address_t p4 = fp->fp_addr.ip4;
p4.as_u32 &= ip4_main.fib_masks[fp->fp_len];