Fix possible NULL dereference in boinc code.
Fix possible NULL dereference in boinc code.

htcondor/htcondor,zhangzhehust/htcondor,zhangzhehust/htcondor,neurodebian/htcondor,djw8605/htcondor,htcondor/htcondor,djw8605/htcondor,htcondor/htcondor,neurodebian/htcondor,neurodebian/htcondor,htcondor/htcondor,zhangzhehust/htcondor,neurodebian/htcondor,zhangzhehust/htcondor,htcondor/htcondor,neurodebian/htcondor,djw8605/htcondor,zhangzhehust/htcondor,djw8605/htcondor,htcondor/htcondor,zhangzhehust/htcondor,djw8605/htcondor,neurodebian/htcondor,djw8605/htcondor,zhangzhehust/htcondor,neurodebian/htcondor,djw8605/htcondor,htcondor/htcondor,djw8605/htcondor,djw8605/htcondor,zhangzhehust/htcondor,htcondor/htcondor,neurodebian/htcondor,zhangzhehust/htcondor,neurodebian/htcondor