- Added sdlmisc_<targetos>.c again. This was necessary since
certain tools create stubs for e.g. osd_break_into_debugger.
If we do not have this in a separate file, the link stage may
break.
- Applied OS/2 patch [Credit: KO Myung-Hun]
- Cleaned up #includes. Removed stdlib.h were possible.
- More malloc to osd_malloc rename.
- SDL monitor modes are read now when they are needed. This is now consistent across platforms.