Added comment on why division by zero is not checked.
Added comment on why division by zero is not checked.

Signed-off-by: Olaf Lessenich <09dc7d5025e152d90232b58d4c490220fe4b9097@fim.uni-passau.de>

shuiblue/JDimeForCpp,shuiblue/JDimeForCpp,shuiblue/JDimeForCpp