nrUE NAS: minor changes in get_allowed_nssai()

This function was very wrong, now it's just wrong.
(It does not sanitize the input properly. Some bad input may have
unexpected effects on the nrUE.)

It needs a serious rewrite.

I just wanted to "fix" it so that it processes correctly some
correct input data.

openair3/NAS/NR_UE/nr_nas_msg_sim.c

@@ -1157,11 +1157,13 @@ static void get_allowed_nssai(nr_nas_msg_snssai_t nssai[8], const uint8_t *pdu_b
       case 0x15: // allowed NSSAI
         length = *pdu_buffer++;
         parse_allowed_nssai(nssai, pdu_buffer, length);
+        pdu_buffer += length;
         break;
 
       default:
-        LOG_W(NAS, "This NAS IEI is not handled when extracting list of allowed NSSAI\n");
-        pdu_buffer = end;
+        LOG_W(NAS, "This NAS IEI (0x%2.2x) is not handled when extracting list of allowed NSSAI\n", type);
+        length = *pdu_buffer++;
+        pdu_buffer += length;
         break;
     }
   }