multiple commas results in empty recipient-adress

In forward.module the explode(',',$recipients) commands in line 624 and 799 may result in empty array-elements if there are multiple commas in the $recipients value, like ",t1@test.de,,t2@test.de,,,t3@test.de,," .
I rarely use php, so hope i have not misunderstood the code there. May it could be fixed with an regexp before the explode-commands, like: $recipients = preg_replace('/,,+/' , ',' , trim($recipients,',') ); ?