enb metric bound check. Fix of heap-buffer overflow issue

srsenb/src/metrics_stdout.cc

@@ -89,8 +89,7 @@ void metrics_stdout::set_metrics(const enb_metrics_t& metrics, const uint32_t pe
 
   for (size_t i = 0; i < metrics.stack.rrc.ues.size(); i++) {
     // make sure we have stats for MAC and PHY layer too
-    if (metrics.stack.mac.ues.size() == 0 || metrics.phy.size() == 0 || i > metrics.stack.mac.ues.size() ||
+    if (i >= metrics.stack.mac.ues.size() || i >= metrics.phy.size()) {
-        i > metrics.phy.size()) {
       break;
     }
     if (metrics.stack.mac.ues[i].tx_errors > metrics.stack.mac.ues[i].tx_pkts) {