Use correct cache warming function

makes use of update_postmeta_cache

resolves ResponsiveImagesCGgh-197

wp-tevko-responsive-images.php

@@ -321,18 +321,10 @@ function tevkori_filter_content_images( $content ) {
 		/**
 		 * Warm object caches for use with wp_get_attachment_metadata.
 		 *
-		 * To avoid making a database call for each image, WP_Query is called
-		 * as a single query with the IDs of all images in the post. This warms
-		 * the object cache with the meta information for all images.
-		 *
-		 * This loop is not used directly.
+		 * To avoid making a database call for each image, a single query
+		 * warms the object cache with the meta information for all images.
 		 **/
-		$attachments = new WP_Query(array(
-			'post_type'  => 'attachment',
-			'posts_per_page' => '-1',
-			'post_status' => 'inherit',
-			'post__in' => $ids,
-		));
+		update_postmeta_cache( $ids );
 	}
 
 	foreach( $matches[0] as $k => $image ) {