make echo_info work if no tlsa is configured

the echo_info function is defined in the timestamp file
which should be sourced before using any function from there.

hooks/post-commit

@@ -37,6 +37,10 @@
 #    address: info@mabulous.com
 #
 
+DIR="${BASH_SOURCE%/*}"
+if [[ ! -d "$DIR" ]]; then DIR="$PWD"; fi
+. "$DIR/timestamping"
+
 TSA0_URL=$(git config timestamping.tsa0.url)
 if [ -z "$TSA0_URL" ]; then
   # Do nothing if TSA0 has not been configured.
@@ -44,10 +48,6 @@ if [ -z "$TSA0_URL" ]; then
   exit 0
 fi
 
-DIR="${BASH_SOURCE%/*}"
-if [[ ! -d "$DIR" ]]; then DIR="$PWD"; fi
-. "$DIR/timestamping"
-
 extended_exit_trap() {
   local EXIT_CODE="$?"
   log "extended_exit_trap $EXIT_CODE"