PHP Warning when viewing group log for non-existent group

[itismadness]

Going to /log.php?search=Group+bogus will bring you to a page that shows nothing, but does raise the following PHP warnings:

Code	Error	Line
mysqli_num_rows(true)	mysqli_num_rows() expects parameter 1 to be mysqli_result, boolean given	/classes/mysql.class.php:489
mysqli_fetch_array(true, 3)	mysqli_fetch_array() expects parameter 1 to be mysqli_result, boolean given	/classes/mysql.class.php:439