TIFFOpenW(const wchar_t* name, const char* mode)
{
	static const char module[] = "TIFFOpenW";
	int m, fd;
	int mbsize;
	char *mbname;
	TIFF* tif;

	m = _TIFFgetMode(mode, module);
	if (m == -1)
		return ((TIFF*)0);

/* for cygwin and mingw */
#ifdef O_BINARY
	m |= O_BINARY;
#endif

	fd = _wopen(name, m, 0666);
	if (fd < 0) {
		TIFFErrorExt(0, module, "%s: Cannot open", name);
		return ((TIFF *)0);
	}

	mbname = NULL;
	mbsize = WideCharToMultiByte(CP_ACP, 0, name, -1, NULL, 0, NULL, NULL);
	if (mbsize > 0) {
		mbname = _TIFFmalloc(mbsize);
		if (!mbname) {
			TIFFErrorExt(0, module,
			"Can't allocate space for filename conversion buffer");
			return ((TIFF*)0);
		}

		WideCharToMultiByte(CP_ACP, 0, name, -1, mbname, mbsize,
				    NULL, NULL);
	}

	tif = TIFFFdOpen((int)fd, (mbname != NULL) ? mbname : "<unknown>",
			 mode);
	
	_TIFFfree(mbname);
	
	if(!tif)
		close(fd);
	return tif;
}

The product divides a value by zero.