Deprecate require_if_theme_supports(). Always require post-thumbnail-…

…template.php. fixes #20556. fixes #20409.

git-svn-id: http://svn.automattic.com/wordpress/trunk@20610 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/deprecated.php

@@ -3152,3 +3152,19 @@ function clean_page_cache( $id ) {
 
 	clean_post_cache( $id );
 }
+
+/**
+ * Checks a theme's support for a given feature before loading the functions which implement it.
+ *
+ * @since 2.9.0
+ * @deprecated 3.4.0
+ * @deprecated Use require()
+ *
+ * @param string $feature the feature being checked
+ * @param string $include the file containing the functions that implement the feature
+ */
+function require_if_theme_supports( $feature, $include ) {
+	_deprecated_function( __FUNCTION__, '3.4', 'require()' );
+	if ( current_theme_supports( $feature ) )
+		require ( $include );
+}

wp-includes/theme.php

@@ -1511,18 +1511,6 @@ function current_theme_supports( $feature ) {
 	return apply_filters('current_theme_supports-' . $feature, true, $args, $_wp_theme_features[$feature]);
 }
 
-/**
- * Checks a theme's support for a given feature before loading the functions which implement it.
- *
- * @since 2.9.0
- * @param string $feature the feature being checked
- * @param string $include the file containing the functions that implement the feature
- */
-function require_if_theme_supports( $feature, $include) {
-	if ( current_theme_supports( $feature ) )
-		require ( $include );
-}
-
 /**
  * Checks an attachment being deleted to see if it's a header or background image.
  *

wp-settings.php

@@ -121,6 +121,7 @@
 require( ABSPATH . WPINC . '/author-template.php' );
 require( ABSPATH . WPINC . '/post.php' );
 require( ABSPATH . WPINC . '/post-template.php' );
+require( ABSPATH . WPINC . '/post-thumbnail-template.php' );
 require( ABSPATH . WPINC . '/category.php' );
 require( ABSPATH . WPINC . '/category-template.php' );
 require( ABSPATH . WPINC . '/comment.php' );
@@ -288,9 +289,6 @@
 
 do_action( 'after_setup_theme' );
 
-// Load any template functions the theme supports.
-require_if_theme_supports( 'post-thumbnails', ABSPATH . WPINC . '/post-thumbnail-template.php' );
-
 // Set up current user.
 $wp->init();