BUG #5571: global hash %_SHARED is not declared as global in the new version

The following bug has been logged online:

Bug reference:      5571
Logged by:          mile
Email address:      mile@avangardsolutions.com
PostgreSQL version: v9.0beta3
Operating system:   Linux
Description:        global hash %_SHARED is not declared as global in the
new version
Details:

We are using strict pragma that's why we are geting the following  error:
ERROR: Global symbol %_SHARED requires explicit package name


However we should not get that error message because
the hash $_SHARED should be declared as global variable.

To reproduce this use the following function:

create or replace function perl_shared() returns void as $$
use strict;
elog(INFO, $_SHARED{'stuff'});
$_SHARED{'stuff'} = '1';
for my $k (keys %_SHARED)
{
    elog(INFO, $k);
}
$$ language plperl;


CREATE LANGUAGE plperl;