- nact.h and xsystem35.h no longer include scenario.h
- Removed `sys_*` aliases in nact.h
- sys_getString() and sys_getConstString() are moved to
scenario.c as sl_getString() and sl_getConstString()
- DEBUG_COMMAND macros are now defined in scenario.h
This fixes a bug in various games where waiting for sound effects to
finish was not working.
`SU var1, var2:` should set var1 to 1 if sound is playing. Before this
fix, it was set to the return value of mus_pcm_get_playposition(), which
is usually 0 (OK).
kichikuou