[#1211] innerring: Fix objectIDs list reader

Signed-off-by: Alex Vanin <alexey@nspcc.ru>

pkg/innerring/internal/client/client.go

@@ -81,14 +81,13 @@ func (x Client) SearchSG(prm SearchSGPrm) (*SearchSGRes, error) {
 
 	for {
 		n, ok = rdr.Read(buf)
-		if !ok {
-			break
-		}
-
 		for i := 0; i < n; i++ {
 			v := buf[i]
 			list = append(list, &v)
 		}
+		if !ok {
+			break
+		}
 	}
 
 	res, err := rdr.Close()