extract EncounterStatic match determination; in doing so fixes "lvl" by
passing byval.
Pichu encounters (2) come before the Gift level 25 pikachu, causing lvl
to be dropped to 5. When pikachu comes around, it compares 5==25 -> bad;
pulling out the method and passing byval allows it to be 25 at the start
of every new encounterstatic checked.
