2001-01-24 Damon Chaplin <damon@helixcode.com> * src/libical/icaltime.c (set_tz): (unset_tz): rewrote to fix problems with freeing the environment string after calling putenv() and to fix memory leaks. (We save a pointer to the last TZ env var we set, so we free it after the next time we set TZ.) svn path=/trunk/; revision=7788