Don't prepend the host if it's already a full URL.

git-svn-id: http://svn.automattic.com/wordpress/trunk@8028 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-admin/press-this.php

@@ -98,10 +98,10 @@ function get_images_from_uri($uri) {
 	if ( empty($matches[1]) ) return '';
 	
 	$sources = array();
-
 	foreach ($matches[1] as $src) {
 		if ( false !== strpos($src, '&') )
 			continue;
+		if ( !strstr( $src, 'http://' ) )
 			$src = 'http://'.str_replace('//','/', $host['host'].'/'.$host['path'].'/'.$src);
 		
 		$sources[] = $src;