Avoid division by zero
Avoid division by zero

SuPair/sstoolkit,lijie121210/sstoolkit,TDness/sstoolkit,sideci-sample/sideci-sample-sstoolkit,carabina/sstoolkit,k131050059/sstoolkit,zjh171/sstoolkit,zilaiyedaren/sstoolkit,cobook/sstoolkit,andaluz/sstoolkit,Amnysia/SSToolkit,samsoffes/sstoolkit,Amnysia/SSToolkit,soffes/sstoolkit,samsoffes/sstoolkit,rtsbtx/sstoolkit