fixed issues found by gcc 4.6 -Wunused-but-set-variable warnings.
fixed issues found by gcc 4.6 -Wunused-but-set-variable warnings.

yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx,yeahdongcn/SEnginx