From 06eeab272d89e6491b48c7bed4d97bb68b821946 Mon Sep 17 00:00:00 2001
From: Josh Blum <josh@joshknows.com>
Date: Tue, 27 Jul 2010 18:46:04 -0700
Subject: usrp: gain group should not try to set gain elements if there are
 none

---
 host/lib/gain_group.cpp | 1 +
 1 file changed, 1 insertion(+)

diff --git a/host/lib/gain_group.cpp b/host/lib/gain_group.cpp
index 3ae9a285e..5a14fa96f 100644
--- a/host/lib/gain_group.cpp
+++ b/host/lib/gain_group.cpp
@@ -70,6 +70,7 @@ public:
 
     void set_value(float gain){
         std::vector<gain_fcns_t> all_fcns = get_all_fcns();
+        if (all_fcns.size() == 0) return; //nothing to set!
 
         //get the max step size among the gains
         float max_step = 0;
-- 
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