*: spelling fixes, thanks Timeless!
VBoxSDLMain-darwin.m: assert->Assert, eprintf/ld_classic issue in 10.6. Also moved the chdir out of the assert, baka.
Use the official SDL framework. The VBoxSDLMain-darwin.m/h are copied from the devel-lite directory of SDL-1.2.12.dmg and only the #include statement was changed.