boost error (popen)

[loginrl103]

last version cacti;
from log

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11/24/2010 07:50:03 PM - BOOST: Poller[0] PROGERR: ERRNO:'8' TYPE:'Notice' MESSAGE:'Undefined variable: fp' IN FILE:'/var/www/cacti/plugins/boost/setup.php' LINE NO:'1633'
11/24/2010 07:50:03 PM - BOOST: Poller[0] PROGERR: ERRNO:'2' TYPE:'Warning' MESSAGE:'pclose(): supplied argument is not a valid stream resource' IN FILE:'/var/www/cacti/plugins/boost/setup.php' LINE NO:'1633'

i view "/var/www/cacti/plugins/boost/setup.php":
line 1581,

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$fp = popen(read_config_option("path_rrdtool") . escape_command(" $command_line"), $popen_type);

then line 1633

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pclose($fp);

so, in line 1581 not checked if the error occurred while open command.