Fix sceUtilityScreenshotUpdate

Fix Dream Club Portable  "After the developer/publisher screen and the age warning only a
black screen."
PPSSPP Modify log: https://gist.github.com/sum2012/db23b62c9682fe07f1c8
JPCSPTrace log: https://gist.github.com/sum2012/1cf8cf8069bdb1d80ec6
Imp sceUtilityScreenshotContStart is the next step.