Always reschedule on vblank, even without handler

Fixes:

 * Astonishia Story
 * LittleBigPlanet
 * Crimson Gem Saga
 * Practical Intelligence Quotient 2
 * Patchwork Heroes (but hangs later again, arg)
 * Stick Man Rescue (maybe, or it was fixed earlier)

Tested with a bunch of games to ensure it doesn't break anything.

-[Unknown]