* autoload.cc (GetModuleFileNameExW): Replace definition of

	* autoload.cc (GetModuleFileNameExW): Replace definition of
	GetModuleFileNameExA.
	* fhandler_process.cc (format_process_maps): Change modname type to
	WCHAR.  Set buffer sizes to PATH_MAX.  Call GetModuleFileNameExW
	instead of GetModuleFileNameExA.  Call mount_info::conv_to_posix_path
	instead of cygwin_conv_to_full_posix_path.  Set posix_modname to
	modname if that call fails.
	(format_process_stat): Set cmd buffer size to NAME_MAX + 1.  Simplify
	setting cmd to process name.
	(format_process_status): Ditto.
	* path.cc (mount_info::conv_to_posix_path): Call sys_wcstombs
	correctly.