pg_regress.sh startup failure patch

Unfortunately, pg_regress.sh fails under Cygwin as follows:

    ============== creating database "regression"         ==============
    psql: FATAL 1:  The database system is starting up

    createdb: database creation failed
    pg_regress: createdb failed

The attached patch "solves" the problem.  Would you be willing to accept
this patch into 7.2?  Or, at least one specifically for Cygwin?

Thanks,
Jason