Intermediate version: converting to use stack allocation
for `&` arguments and results in a callable, only x86_64
and x86 updated so far.
original commit: 645e1ec56376548cdef1849ba7ff2f56a926af45
- added a cast to eliminate warnings in c/number.c
- fixed bug in Windows version of directory-separator-predicate in s/6.ss when path-* procedures are passed a path that is not a string.
- fixed bug in s/cp0.ss on Windows with $foreign-wchar?.
- fixed spelling of non-existent
original commit: dd1b741f7572cb0d5a6210c7c796aee7c4026040
