MRBS block: returl parameter not expected by edit_entry_handler.php may cause server 500 error

edit_entry_handler uses the $returl variable; however, there is no optional or require param at the beginning of the file so it is undefined and seems to cause a server 500 error on some setups. I think the solution is to add:

$returl = optional_param('returl',NULL, PARAM_LOCALURL);

toward the beginning of the file and then all should work well.

Thanks to Don Agahari for bringing this issue to my attention. Peace - Anthony

p.s. affects both 1.9 and HEAD versions