use TSystem::TempFileName(), which uses mkstemp(), instead of tmpnam().
use TSystem::TempFileName(), which uses mkstemp(), instead of tmpnam().

tmpnam() was causing deprecation warnings on OSX 10.9.

kirbyherm/root-r-tools,tc3t/qoot,tc3t/qoot,kirbyherm/root-r-tools,Dr15Jones/root,Dr15Jones/root,tc3t/qoot,tc3t/qoot,kirbyherm/root-r-tools,kirbyherm/root-r-tools,tc3t/qoot,tc3t/qoot,tc3t/qoot,Dr15Jones/root,Dr15Jones/root,kirbyherm/root-r-tools,Dr15Jones/root,Dr15Jones/root,Dr15Jones/root,tc3t/qoot,kirbyherm/root-r-tools,tc3t/qoot,tc3t/qoot,kirbyherm/root-r-tools