Warning fixes.
Warning fixes.

Fix types of variables used for tracking input and output from write; should be ssize_t (output) and size_t (input).  Removes signed/unsigned comparison warning.

Wrapped write and read with a version that exits with an error on any errors.  previously we were ignoring errors, which would likely cause further problems.  A "proper" fix of dealing with errors is probably not worth the time for the hopefully soon to be retired checkpoint server.

djw8605/condor,bbockelm/condor-network-accounting,zhangzhehust/htcondor,htcondor/htcondor,bbockelm/condor-network-accounting,mambelli/osg-bosco-marco,djw8605/htcondor,neurodebian/htcondor,zhangzhehust/htcondor,djw8605/htcondor,zhangzhehust/htcondor,neurodebian/htcondor,djw8605/condor,neurodebian/htcondor,neurodebian/htcondor,zhangzhehust/htcondor,neurodebian/htcondor,bbockelm/condor-network-accounting,bbockelm/condor-network-accounting,mambelli/osg-bosco-marco,djw8605/htcondor,djw8605/condor,htcondor/htcondor,zhangzhehust/htcondor,djw8605/condor,zhangzhehust/htcondor,bbockelm/condor-network-accounting,neurodebian/htcondor,mambelli/osg-bosco-marco,neurodebian/htcondor,htcondor/htcondor,bbockelm/condor-network-accounting,djw8605/htcondor,djw8605/condor,mambelli/osg-bosco-marco,djw8605/htcondor,djw8605/condor,mambelli/osg-bosco-marco,djw8605/htcondor,htcondor/htcondor,zhangzhehust/htcondor,htcondor/htcondor,htcondor/htcondor,htcondor/htcondor,mambelli/osg-bosco-marco,djw8605/condor,djw8605/htcondor,neurodebian/htcondor,neurodebian/htcondor,djw8605/condor,mambelli/osg-bosco-marco,bbockelm/condor-network-accounting,bbockelm/condor-network-accounting,zhangzhehust/htcondor,zhangzhehust/htcondor,djw8605/htcondor,htcondor/htcondor,mambelli/osg-bosco-marco,djw8605/htcondor