Elf favored class and leyline guardian witch

[primevalivy]

The leyline guardian witch makes them a spontaneous caster with the spells known of a sorcerer. Can you still take the elf favored class bonus for an extra spell known every level or does it not work since they no longer get spells from a familiar?

[Fuzzy-Wuzzy]

RAW it does not work. If it's a home game, the GM certainly ought to change it to something similar that does; if it's PFS, you lose.