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Notice fixes from nbachiyski. fixes #5961
git-svn-id: https://develop.svn.wordpress.org/trunk@6983 602fd350-edb4-49c9-b593-d223f7449a82
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@@ -259,7 +259,7 @@ function is_active_widget($callback) {
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if ( is_array($sidebars_widgets) ) foreach ( $sidebars_widgets as $sidebar => $widgets )
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if ( is_array($widgets) ) foreach ( $widgets as $widget )
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if ( $wp_registered_widgets[$widget]['callback'] == $callback )
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if ( isset($wp_registered_widgets[$widget]['callback']) && $wp_registered_widgets[$widget]['callback'] == $callback )
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return $sidebar;
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return false;
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