[wp-trac] [WordPress Trac] #20603: Warning error occurs on the default parameter of "admin-head-callback" in add_theme_support.

[WordPress Trac]

#20603: Warning error occurs on the default parameter of "admin-head-callback" in
add_theme_support.
--------------------------+-----------------------------
 Reporter:  jim912        |      Owner:
     Type:  defect (bug)  |     Status:  new
 Priority:  normal        |  Milestone:  Awaiting Review
Component:  Themes        |    Version:  3.4
 Severity:  normal        |   Keywords:  has-patch
--------------------------+-----------------------------
 When you make settings of custom header using add_theme_support on
 functions.php of a theme, if you use default value without defining admin-
 head-callback, warning error occurs as follows on admin screen of custom
 header.

 {{{
 Warning: call_user_func_array() expects parameter 1 to be a valid
 callback, function '' not found or invalid function name in path-to-
 wordpress-root/wp-includes/plugin.php on line 403
 }}}

 To fix this, I think better to change default value of admin-head-callback
 into  __return_false, on /wp-includes/theme.php. Here's patch.

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Ticket URL: <http://core.trac.wordpress.org/ticket/20603>
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