inet function return untestable texts

Laurent Wacrenier (lwa@teaser.fr) reports a bug with a severity of 2
The lower the number the more severe it is.

Short Description
inet function return untestable texts

Long Description
I'm running 7.0.3 on FreeBSD

host, netmask, etc.. inet function return unusable strings :
for example, host('10.0.0.1') print '10.0.0.1' but
is you make a comparison with '=', the result is alway false.

char_length reports this two strings have differents length.



Sample Code
test=# select host('10.0.0.1'), char_length(host('10.0.0.1')), char_length('10.0.0.1');
   host   | char_length | char_length
----------+-------------+-------------
 10.0.0.1 |           9 |           8
(1 row)
test=# select host('10.0.0.1') = '10.0.0.1', host('10.0.0.1') like '10.0.0.1';
 ?column? | ?column?
----------+----------
 f        | t


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