stream.rb in eco-helpers-2.7.17

- old
+ new

@@ -35,9 +35,10 @@
           log(:debug) { msg.join("\n") }
         end
       end
 
       def move_to_idx(start_at_idx)
+        start_at_idx ||= 0
         next_idx while (idx < start_at_idx) && (self.row = csv.shift)
       end
 
       private
 