fix integer arithmetic bug that caused C0 and C1 to merge arbitrarily often
fix integer arithmetic bug that caused C0 and C1 to merge arbitrarily often

git-svn-id: 459970da87506910ac315916d0f5985452181198@767 8dad8b1f-cf64-0410-95b6-bcf113ffbcfe

sears/bLSM,sears/bLSM,sears/bLSM