get_current_page was called incorrectly

[andrejarh]

Upon activating a custom theme with the merlin, I noticed a php notice:

Notice : get_current_page was called incorrectly .
Current page retrieval should be called on or after the current_screen hook.
Please see Debugging in WordPress for more information.

If I comment out the do_action( 'admin_head' ) in class-merlin.php protected function header(), then the notice is gone. However I do not fully understand the consequences of commenting out this line, so I am not sure if this is a good idea.