Switch to side-by-side view

--- a/libupnpp/control/discovery.cxx
+++ b/libupnpp/control/discovery.cxx
@@ -297,7 +297,7 @@
         m_reason = "Discover work queue start failed";
         return;
     }
-    pthread_yield();
+    sched_yield();
     LibUPnP *lib = LibUPnP::getLibUPnP();
     if (lib == 0) {
         m_reason = "Can't get lib";