re_intuit_start(): give "other" block it's own 's'

re_intuit_start(): give "other" block it's own 's'

There's an 's' var global to the whole function; but give the "other
substr" code block its own local 's' var, since its only used as a tmp
var, not to pass values to or from the block. Eventually we'll remove the
global 's' altogether.