[Plugin: WP e-Commerce] Attempts to create thumbnails when no attached images

The plugin attempts to create thumbnails when product has no attached images. Patch follows.

--- wp-content/plugins/wp-e-commerce/wpsc-includes/product-template.php	(tag 3.8.7.6.1)
+++ wp-content/plugins/wp-e-commerce/wpsc-includes/product-template.php	(working copy)
@@ -1203,7 +1203,7 @@

 	// calculate the height based on the ratio of the original demensions
 	// blame Cameron if this is buggy :P
-	if ( $height == 0 || $width ==0 ){
+	if ( isset($thumbnail_id) && ($height == 0 || $width ==0 )){
 		$attachment_meta = get_post_meta( $thumbnail_id,'_wp_attachment_metadata', false );
 		$original_width = $attachment_meta[0]['width'];
 		$original_height = $attachment_meta[0]['height'];

http://wordpress.org/extend/plugins/wp-e-commerce/