check for duplicated stack addresses by JimLee168

Based on https://code.google.com/p/jpcsp/source/detail?r=3569

Fix WWE SmackDown! vs. RAW 2006,2007,2008 booting
Fix #6671

2006 Modify log: https://gist.github.com/sum2012/a74a7199dcb3058fa5d8
https://github.com/hrydgard/ppsspp/pull/6493#discussion_r14533896

You'll need to load the old struct, and then convert it to the new struct.  Look at GeInterruptData_v1 in sceGe.cpp also.

-[Unknown]