Code generation fix: Specifying new values for existing enums in a separate file might overwrite existing ones

[florianessl]

Easily reproducible by introducing new values in easyrpg_fields.csv:

EventPage,Trigger,map_init_deferred,8
EventPage,Trigger,map_init_immediate,9

Depends on order though. I defined these values at line 35, right before the Maniac stuff: EventPage,ManiacEventInfo,*