client: fix missing init of 'i'

Signed-off-by: Jens Axboe <axboe@fb.com>
diff --git a/client.c b/client.c
index 6e7ed6d..e70a27d 100644
--- a/client.c
+++ b/client.c
@@ -1232,7 +1232,7 @@
 	ret->compressed		= le32_to_cpu(ret->compressed);
 	ret->log_offset		= le32_to_cpu(ret->log_offset);
 
-	samples = &ret->samples[i];
+	samples = &ret->samples[0];
 	for (i = 0; i < ret->nr_samples; i++) {
 		struct io_sample *s;