Trying to get property 'type' of non-object in block_inject_exceptions_list()

Getting this error trying to view the list of exceptions in the admin section.

Notice: Trying to get property 'type' of non-object in block_inject_exceptions_list() (line 64 of block_inject.admin.inc).

I'm guessing that a node was deleted but the corresponding block_inject exceptions table was not updated.

Maybe some error checking here between these lines (63 & 64) and a routine to clean up the exceptions table when content is deleted:

63: $node = node_load($row->nid);
64: $node_type = node_type_load($node->type);