Fix Coverity Scan CID 339978 (Variable msg going out of scope leaks the storage it points to..)

targets/ARCH/ETHERNET/USERSPACE/LIB/eth_raw.c

@@ -591,5 +591,6 @@ int eth_get_dev_conf_raw_IF4p5(openair0_device *device) {
   //device->openair0_cfg=(openair0_config_t *)(msg + MAC_HEADER_SIZE_BYTES);
   printf("[%s] binding mod to hardware address %x:%x:%x:%x:%x:%x           hardware address %x:%x:%x:%x:%x:%x\n",((device->host_type == RAU_HOST) ? "RAU": "RRU"),eth->ehd.ether_shost[0],eth->ehd.ether_shost[1],eth->ehd.ether_shost[2],eth->ehd.ether_shost[3],eth->ehd.ether_shost[4],eth->ehd.ether_shost[5],eth->ehd.ether_dhost[0],eth->ehd.ether_dhost[1],eth->ehd.ether_dhost[2],eth->ehd.ether_dhost[3],eth->ehd.ether_dhost[4],eth->ehd.ether_dhost[5]);
  	  
+  free(msg);
   return 0;
 }