fixing bug in RRC measurement when receiving periodic config

in the UE conformance testing we've spotted an issue
where an event was evaluated even though the trigger type for
the report was periodic which caused an exception in RRC

srsue/src/stack/rrc/rrc.cc

@@ -2985,21 +2985,23 @@ void rrc::rrc_meas::calculate_triggers(uint32_t tti)
   }
 
   for (std::map<uint32_t, meas_t>::iterator m = active.begin(); m != active.end(); ++m) {
-    report_cfg_t* cfg  = &reports_cfg[m->second.report_id];
+    // make sure report config exists
+    if (reports_cfg.find(m->second.report_id) == reports_cfg.end()) {
+      log_h->error("Error in measurement id=%d, report id=%d is not configured.\n", m->first, m->second.report_id);
+      break;
+    }
+    report_cfg_t* cfg  = &reports_cfg.at(m->second.report_id);
     double        hyst = 0.5 * cfg->event.hysteresis;
     float         Mp   = pcell_measurement.ms[cfg->trigger_quantity];
 
-    eutra_event_s::event_id_c_ event_id  = cfg->event.event_id;
-    std::string                event_str = event_id.type().to_string();
-
     bool gen_report = false;
 
     if (cfg->trigger_type == report_cfg_t::EVENT) {
       // A1 & A2 are for serving cell only
-      if (event_id.type().value < eutra_event_s::event_id_c_::types::event_a3) {
+      if (cfg->event.event_id.type().value < eutra_event_s::event_id_c_::types::event_a3) {
         bool enter_condition;
         bool exit_condition;
-        if (event_id.type() == eutra_event_s::event_id_c_::types::event_a1) {
+        if (cfg->event.event_id.type() == eutra_event_s::event_id_c_::types::event_a1) {
           uint8_t range;
           if (cfg->event.event_id.event_a1().a1_thres.type().value == thres_eutra_c::types::thres_rsrp) {
             range = cfg->event.event_id.event_a1().a1_thres.thres_rsrp();
@@ -3039,7 +3041,7 @@ void rrc::rrc_meas::calculate_triggers(uint32_t tti)
             bool    enter_condition = false;
             bool    exit_condition  = false;
             uint8_t range, range2;
-            switch (event_id.type().value) {
+            switch (cfg->event.event_id.type().value) {
               case eutra_event_s::event_id_c_::types::event_a3:
                 Off             = 0.5 * cfg->event.event_id.event_a3().a3_offset;
                 enter_condition = Mn + Ofn + Ocn - hyst > Mp + Ofp + Ocp + Off;
@@ -3072,7 +3074,7 @@ void rrc::rrc_meas::calculate_triggers(uint32_t tti)
                 exit_condition  = (Mp - hyst > th1) && (Mn + Ofn + Ocn + hyst < th2);
                 break;
               default:
-                log_h->error("Error event %s not implemented\n", event_str.c_str());
+                log_h->error("Error event %s not implemented\n", cfg->event.event_id.type().to_string().c_str());
             }
             gen_report |= process_event(&cfg->event,
                                         tti,