pex-win32.c (<errno.h>): Include.

pex-win32.c (<errno.h>): Include.

	* pex-win32.c (<errno.h>): Include.
	(fix_argv): Remove.
	(argv_to_cmdline): New function.
	(std_suffixes): New variable.
	(no_suffixes): Likewise.
	(find_executable): New function.
	(win32_spawn): Likewise.
	(spawn_script): Use win32_spawn instead of _spawnv[p].
	(pex_win32_exec_child): Replace MSVCRT calls with Win32 API calls.
	(pex_win32_wait): Likewise.

From-SVN: r112592