Twenty Twelve: make twentytwelve_is_categorized_site() pluggable, see #21479.

git-svn-id: http://core.svn.wordpress.org/trunk@21489 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-content/themes/twentytwelve/functions.php

@@ -332,6 +332,7 @@ function twentytwelve_entry_meta() {
 }
 endif;
 
+if ( ! function_exists( 'twentytwelve_is_categorized_site' ) ) :
 /**
  * Returns true if a blog has more than one category.
  *
@@ -347,6 +348,7 @@ function twentytwelve_is_categorized_site() {
 
 	return true;
 }
+endif;
 
 /**
  * Extends the default WordPress body class to denote: