Initialize tzid and comps in tz.py, to prevent the code from ever raising a NameError (even with broken files).  Johan Dahlin suggested the fix after a pyflakes run.
Initialize tzid and comps in tz.py, to prevent the code from ever
raising a NameError (even with broken files).  Johan Dahlin suggested
the fix after a pyflakes run.

emsoftware/python-dateutil,sprymix/python-dateutil,pganssle/dateutil-test-codecov,pganssle/dateutil-test-codecov,Bachmann1234/dateutil,abalkin/dateutil,sprymix/dateutil,adamgreig/python-dateutil,jenshnielsen/dateutil,abalkin/dateutil,mjschultz/dateutil