use snprintf, strdup, ... where possible to make for safer operation -- Martin Pelikan git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@2299 a5681a0c-68f1-0310-ab6d-d61299d08faa
RRDs.xs uses &PL_sv_undef to insert undefined values into arrays and hashes. This leads to all sorts of problems. For details, please see "AVs, HVs and undefined values" section in perlguts(1). -- patch by tobez+lars git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@2296 a5681a0c-68f1-0310-ab6d-d61299d08faa