Fix the build on linux, static_cast problem
Fix the build on linux, static_cast problem

paulmartel/voltdb,wolffcm/voltdb,deerwalk/voltdb,creative-quant/voltdb,wolffcm/voltdb,wolffcm/voltdb,kumarrus/voltdb,ingted/voltdb,flybird119/voltdb,simonzhangsm/voltdb,kumarrus/voltdb,ingted/voltdb,paulmartel/voltdb,paulmartel/voltdb,flybird119/voltdb,wolffcm/voltdb,flybird119/voltdb,zuowang/voltdb,VoltDB/voltdb,flybird119/voltdb,ingted/voltdb,simonzhangsm/voltdb,creative-quant/voltdb,deerwalk/voltdb,migue/voltdb,paulmartel/voltdb,VoltDB/voltdb,migue/voltdb,creative-quant/voltdb,flybird119/voltdb,creative-quant/voltdb,simonzhangsm/voltdb,creative-quant/voltdb,VoltDB/voltdb,zuowang/voltdb,kumarrus/voltdb,zuowang/voltdb,deerwalk/voltdb,deerwalk/voltdb,migue/voltdb,wolffcm/voltdb,kumarrus/voltdb,zuowang/voltdb,creative-quant/voltdb,zuowang/voltdb,VoltDB/voltdb,creative-quant/voltdb,simonzhangsm/voltdb,VoltDB/voltdb,wolffcm/voltdb,wolffcm/voltdb,ingted/voltdb,zuowang/voltdb,kumarrus/voltdb,ingted/voltdb,paulmartel/voltdb,flybird119/voltdb,ingted/voltdb,paulmartel/voltdb,creative-quant/voltdb,ingted/voltdb,deerwalk/voltdb,simonzhangsm/voltdb,zuowang/voltdb,VoltDB/voltdb,paulmartel/voltdb,simonzhangsm/voltdb,flybird119/voltdb,flybird119/voltdb,kumarrus/voltdb,kumarrus/voltdb,migue/voltdb,deerwalk/voltdb,wolffcm/voltdb,paulmartel/voltdb,migue/voltdb,deerwalk/voltdb,simonzhangsm/voltdb,migue/voltdb,ingted/voltdb,deerwalk/voltdb,migue/voltdb,VoltDB/voltdb,simonzhangsm/voltdb,migue/voltdb,kumarrus/voltdb,zuowang/voltdb