gcc45.
- avoid implicit int, declare void functions void
- return values from non-void functions
- put most external declarations properly in header files
- use some static and const
- fix up a big mess with function pointer casting
- use standard includes, don't provide own decls of standard functions
- use types matching libc when providing own malloc, printf, and putchar
- use <ctype.h> functions correctly
- silence assorted compiler warnings
- fix some bugs exposed by compiler warnings
- don't intentionally exercise signed overflow
- remove some unused items
- add patch comments to other patch (patch-aa)
As this includes several fixes and removes some undefined behavior on
a commonly reachable code path, bump PKGREVISION.
