* sys_spu: Fix race in sys_spu_thread_group_destroy and other minor fixes
* SPU: Wait for all threads to have error codes if exited by sys_spu_thread_exit
On last thread in group to run.
* sys_spu: Fix sys_spu_thread_group_start
* fixup ad fix sys_spu_thread_group_terminate
idk why "- !group->running" was put in the first place but its probably no longer relevant due to other changes and was causing other issues such as not always waiting for last SPU thread to set group state to INITIALIZED.
f95b81574f