
Several of our shell scripts hard-code the object ID of the empty tree. To avoid any problems when changing hashes, compute this value on startup of the script. For performance, store the value in a variable and reuse it throughout the life of the script. Signed-off-by: brian m. carlson <sandals@crustytoothpaste.net> Signed-off-by: Junio C Hamano <gitster@pobox.com>