Replace unsetenv() and setenv() with older putenv().

diff --git a/git-log-script b/git-log-script
index 049d02ea1452bca07188cacecb991a56cd97a5f1..9260f920559578feac9922a7c2ef781252567952 100755 (executable)
--- a/git-log-script
+++ b/git-log-script
@@ -1,3 +1,4 @@
 #!/bin/sh
-. git-sh-setup-script || die "Not a git archive"
+revs=$(git-rev-parse --revs-only --default HEAD "$@") || exit
+[ "$revs" ] || die "No HEAD ref"
 git-rev-list --pretty $(git-rev-parse --default HEAD "$@") | LESS=-S ${PAGER:-less}