enterOutAlt not invoked in left-recursive rules and/or not properly (gen'd code)

[parrt]

i'll need to make a scatter function that converts predicted alt i to alt prior to LR elimination

e : e '*' e
  | INT
  | e '+' e
  | ID
  ;

alt 1 in primary decision should emit alt 2, alt 2 in decision should emit alt 4. alt 2 of rec op should map to alt 3. it's a function of which decision in lr rule and predicted alt; no biggie to set up in interp but maybe better as code gen in gen'd parsers.