passing function's output into C function

I have table with column of type "inet". Then I have my own function
resolveip(text). It works okay when I store IP addres into column typed
as text or varchar. But with type of inet I run into this problem:

select host(acc_ip), resolveip(host(acc_ip)) from access_test limit 15

host | resolveip
----------------+-----------------------------------
212.80.81.141 | Bad IP address: '212.80.81.141.'
212.80.81.141 | Bad IP address: '212.80.81.141'
212.80.81.141 | Bad IP address: '212.80.81.141'
212.80.81.141 | Bad IP address: '212.80.81.141'
80.139.171.208 | Bad IP address: '80.139.171.208*'
212.80.81.141 | Bad IP address: '212.80.81.1418'
212.80.81.141 | Bad IP address: '212.80.81.1418'
211.22.169.82 | Bad IP address: '211.22.169.828'
81.0.234.52 |
62.24.89.106 | Bad IP address: '62.24.89.106`'
81.0.234.52 | Bad IP address: '81.0.234.526'
212.80.81.141 | Bad IP address: '212.80.81.1415'
62.84.131.161 | Bad IP address: '62.84.131.1615'
212.80.81.141 | Bad IP address: '212.80.81.1415'
195.122.204.15 | e0-a11.b1.lan.prg.vol.cz

Is there something I'm missing when data are passed from function to
function?

--
Kamil Kukura