In WP_Comment_Query, only allow __call() to run against ->get_search_sql().

See #30891.


git-svn-id: https://develop.svn.wordpress.org/trunk@31150 602fd350-edb4-49c9-b593-d223f7449a82

src/wp-includes/comment.php

@@ -285,8 +285,11 @@ class WP_Comment_Query {
 	 * @return mixed|bool Return value of the callback, false otherwise.
 	 */
 	public function __call( $name, $arguments ) {
+		if ( 'get_search_sql' === $name ) {
 			return call_user_func_array( array( $this, $name ), $arguments );
 		}
+		return false;
+	}
 
 	/**
 	 * Execute the query