message definition for heartbeat_add_node

I am not sure if this is a bug or not.

In heartbeat.module

in function _heartbeat_messages_rebuild($defaults, $stored)

this comparison runs

$diffs = array_diff_assoc($default, $stored_lookup[$default['message_id']]);

after

$default['concat_args'] = heartbeat_encode_message_variables($default['concat_args']);

but when 'concat_args' is stored, it is prepared with

function _heartbeat_message_prepare($record)

which adds these two values, if missing,

$record->concat_args['merge_separator_t'] = preg_match('/[a-z]/', $record->concat_args['merge_separator']);
$record->concat_args['merge_end_separator_t'] = preg_match('/[a-z]/', $record->concat_args['merge_end_separator']);

so the comparison above appears to always fail for messages heartbeat_add_node and any other that does not explicitly set 'merge_separator_t' and 'merge_end_separator_t'.