fix OUString conversion in lotuswordpro
fix OUString conversion in lotuswordpro

second arg is number of input bytes, not number of resulting codepoints

Change-Id: I76ab899fa3875f37075214363188cf897e018f22

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core