After [31645], for the `default` `case`, return the result of checking the extension against the passed type.

See #25275.

Built from https://develop.svn.wordpress.org/trunk@31646


git-svn-id: http://core.svn.wordpress.org/trunk@31627 1a063a9b-81f0-0310-95a4-ce76da25c4cd

wp-includes/post.php

@@ -5106,9 +5106,10 @@ function wp_attachment_is( $type, $post_id = 0 ) {
 
 	case 'video':
 		return in_array( $ext, wp_get_video_extensions() );
-	}
 
-	return false;
+	default:
+		return $type === $ext;
+	}
 }
 
 /**

wp-includes/version.php

@@ -4,7 +4,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '4.2-alpha-31645';
+$wp_version = '4.2-alpha-31646';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.