tagged_stream_block patch

gistfile1.txt

diff --git a/gnuradio-runtime/lib/tagged_stream_block.cc b/gnuradio-runtime/lib/tagged_stream_block.cc
index 252a235..6d743e1 100644
--- a/gnuradio-runtime/lib/tagged_stream_block.cc
+++ b/gnuradio-runtime/lib/tagged_stream_block.cc
@@ -141,14 +141,16 @@ namespace gr {
     if(n_produced == WORK_DONE) {
       return n_produced;
     }
-    for(int i = 0; i < (int) d_n_input_items_reqd.size(); i++) {
-      consume(i, d_n_input_items_reqd[i]);
-    }
+
     if (n_produced > 0) {
+      for(int i = 0; i < (int) d_n_input_items_reqd.size(); i++) {
+        consume(i, d_n_input_items_reqd[i]);
+      }
       update_length_tags(n_produced, output_items.size());
+
+      d_n_input_items_reqd.assign(input_items.size(), 0);
     }
 
-    d_n_input_items_reqd.assign(input_items.size(), 0);
 
     return n_produced;
   }