HAWQ-313. Fix dereference pointer before null check
HAWQ-313. Fix dereference pointer before null check

cwelton/incubator-hawq,wengyanqing/incubator-hawq,cwelton/incubator-hawq,stanlyxiang/incubator-hawq,outofmem0ry/incubator-hawq,jianlirong/incubator-hawq,jianlirong/incubator-hawq,wengyanqing/incubator-hawq,jianlirong/incubator-hawq,lavjain/incubator-hawq,lavjain/incubator-hawq,lavjain/incubator-hawq,huor/incubator-hawq,huor/incubator-hawq,jianlirong/incubator-hawq,outofmem0ry/incubator-hawq,huor/incubator-hawq,huor/incubator-hawq,huor/incubator-hawq,cwelton/incubator-hawq,wengyanqing/incubator-hawq,lavjain/incubator-hawq,outofmem0ry/incubator-hawq,jianlirong/incubator-hawq,lavjain/incubator-hawq,jianlirong/incubator-hawq,wengyanqing/incubator-hawq,outofmem0ry/incubator-hawq,wengyanqing/incubator-hawq,lavjain/incubator-hawq,huor/incubator-hawq,cwelton/incubator-hawq,jianlirong/incubator-hawq,stanlyxiang/incubator-hawq,outofmem0ry/incubator-hawq,cwelton/incubator-hawq,outofmem0ry/incubator-hawq,lavjain/incubator-hawq,stanlyxiang/incubator-hawq,wengyanqing/incubator-hawq,wengyanqing/incubator-hawq,jianlirong/incubator-hawq,wengyanqing/incubator-hawq,stanlyxiang/incubator-hawq,cwelton/incubator-hawq,outofmem0ry/incubator-hawq,lavjain/incubator-hawq,stanlyxiang/incubator-hawq,huor/incubator-hawq,stanlyxiang/incubator-hawq,outofmem0ry/incubator-hawq,cwelton/incubator-hawq,stanlyxiang/incubator-hawq