Use --chunk-size-limit || 1 for checking if a table can be done in one chunk to avoid chunking empty tables. Checksums for empty tables are now written.

t/pt-table-checksum/samples/empty-table-bug-987393.sql

@@ -0,0 +1,18 @@
+DROP DATABASE IF EXISTS test;
+CREATE DATABASE test;
+USE test;
+
+CREATE TABLE `test_empty` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8 AUTO_INCREMENT=1 ;
+
+
+CREATE TABLE `test_full` (
+  `id` int(11) NOT NULL AUTO_INCREMENT,
+  `d` text NOT NULL,
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB  DEFAULT CHARSET=utf8 AUTO_INCREMENT=2 ;
+
+INSERT INTO `test_full` (`id`, `d`) VALUES
+(1, '2');