examples: ssize_t is signed, not unsigned
diff --git a/examples/index-pack.c b/examples/index-pack.c
index 641587e..0941e09 100644
--- a/examples/index-pack.c
+++ b/examples/index-pack.c
@@ -11,7 +11,7 @@
# define read _read
# define close _close
-#define ssize_t unsigned int
+#define ssize_t int
#else
# include <unistd.h>
#endif