Avoid a rare NPE

git-svn-id: http://zxing.googlecode.com/svn/trunk@2650 59b500cc-1b3d-0410-9834-0bbf25fbcc57
More Japanese updates from Satoshi K.

git-svn-id: http://zxing.googlecode.com/svn/trunk@2651 59b500cc-1b3d-0410-9834-0bbf25fbcc57
Polish updates from Łukasz

git-svn-id: http://zxing.googlecode.com/svn/trunk@2652 59b500cc-1b3d-0410-9834-0bbf25fbcc57
Merge remote-tracking branch 'zxing-main/master'