Correct the startSector populated by sceIoDread().

Sneaky little bug, took me longer to track down than it should have.

The startSector read from `sceIoDread()` was previously of the directory entry, breaking any games that used it to list a directory and then use sce_lbn reads.

Fixes Kahoots (working this time, not accidentally working, heh) and Brave Story (which has some pretty major gfx issues.)  Maybe others?  One liner fix ftw.

-[Unknown]