ToUnicode CMap is not written correctly when the entry count is just 100.

The following warning log is output when I execute attached PDFSample.java.
org.apache.pdfbox.pdmodel.font.PDFont <init>
WARN: Invalid ToUnicode CMap in font AAKCFF+IPAMincho
org.apache.pdfbox.pdmodel.font.PDType0Font toUnicode
WARN: No Unicode mapping for CID+598 (598) in font AAKCFF+IPAMincho
:

This program creates a simple japanese pdf and read the image.
This program reads a font file. You can download the file from the following URL.
https://ipafont.ipa.go.jp/old/ipafont/download.html#en

I investigated the problem and found a bug in ToUnicodeWriter class.
In writeTo method, a loop count in a operator is calculated by the following line. But the count will be 0 if the srcFrom size is just 100.
int count = batch == batchCount - 1 ? srcFrom.size() % 100 : 100;

I changed this line to below and I confirmed that the problem was resolved.
int count = batch == batchCount - 1 ? srcFrom.size() - 100 * batch : 100;