Avoid segmentation fault for LTE

openair2/LAYER2/MAC/eNB_scheduler_primitives.c

@@ -1985,10 +1985,13 @@ find_UE_id(module_id_t mod_idP,
 {
   int UE_id;
   UE_info_t *UE_info = &RC.mac[mod_idP]->UE_info;
+  if(!UE_info)
+    return -1;
 
   for (UE_id = 0; UE_id < MAX_MOBILES_PER_ENB; UE_id++) {
     if (UE_info->active[UE_id] == TRUE) {
-      if (UE_info->UE_template[UE_PCCID(mod_idP, UE_id)][UE_id].rnti == rntiP) {
+      int CC_id = UE_PCCID(mod_idP, UE_id);
+      if (CC_id>=0 && CC_id<NFAPI_CC_MAX && UE_info->UE_template[CC_id][UE_id].rnti == rntiP) {
         return UE_id;
       }
     }