Merge lp:~percona-toolkit-dev/percona-toolkit/fix-1052475-ptc-uninit-crash-slave-errors into lp:percona-toolkit/2.1

[Brian Fraser]

[Daniel Nichter (daniel-nichter)]

review: Approve

=== modified file 'bin/pt-table-checksum'
--- bin/pt-table-checksum	2012-11-13 15:22:01 +0000
+++ bin/pt-table-checksum	2012-11-16 01:14:24 +0000
@@ -10444,6 +10444,12 @@
             next;
          }
       }
+      # If we have no chunks, which can happen if the slaves
+      # were skipped due to errors, then @chunks will be empty
+      # and nothing of the following applies. In fact, it
+      # leads to an uninit warning because of $chunks[0]; See
+      # https://bugs.launchpad.net/percona-toolkit/+bug/1052475
+      next unless @chunks;
       @chunks = sort { $a <=> $b } @chunks;
       if ( $chunks[0] < $max_chunk ) {
          if ( $check_pr ) {