Transceiver: Check return value when binding IP addr for clock socket

No need to continue further since anyway we'll end up exiting.

Change-Id: Id8b38b40df5744beb705d560defb06532cf0fd44
diff --git a/Transceiver52M/Transceiver.cpp b/Transceiver52M/Transceiver.cpp
index e946aac..244f372 100644
--- a/Transceiver52M/Transceiver.cpp
+++ b/Transceiver52M/Transceiver.cpp
@@ -212,6 +212,8 @@
 				    mLocalAddr.c_str(), mBasePort,
 				    mRemoteAddr.c_str(), mBasePort + 100,
 				    OSMO_SOCK_F_BIND | OSMO_SOCK_F_CONNECT);
+  if (mClockSocket < 0)
+    return false;
 
   for (size_t i = 0; i < mChans; i++) {
     c_srcport = mBasePort + 2 * i + 1;