end_seen flag to bit

src/zfr_iter.h

@@ -33,7 +33,7 @@ typedef void zfr_iter_f(void *priv, const char *u, const char *h);
 struct zfr_iter_s {
 	unsigned		magic;
 #define ZFR_ITER_MAGIC		0x2d560bd8
-	unsigned		end_seen;
+	unsigned		end_seen:1;
 	struct zipflow_top	*zft;
 	char			*buf;
 	size_t			len;