From 9533662a0e4eaf889981fd092bf40751b9ec1c0f Mon Sep 17 00:00:00 2001
From: Antonio Ramos <antonio.ramosdet@gmail.com>
Date: Thu, 22 Feb 2018 11:18:37 +0100
Subject: [PATCH] Minor change

---
 .../observables/gnuradio_blocks/hybrid_observables_cc.cc        | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.cc b/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.cc
index 27568c0c6..28221f150 100644
--- a/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.cc
+++ b/src/algorithms/observables/gnuradio_blocks/hybrid_observables_cc.cc
@@ -544,6 +544,8 @@ int hybrid_observables_cc::general_work(int noutput_items __attribute__((unused)
         }
         i++;
     }
+    d_num_valid_channels = valid_channels.count();
+    if(d_num_valid_channels == 0) { return 0; }
 
     correct_TOW_and_compute_prange(epoch_data);
     std::vector<Gnss_Synchro>::iterator it2 = epoch_data.begin();