Fix another compiler warning

We do need a default: arm here as the switch is not supposed to deal with
all possible values for the enum.

Signed-off-by: Ronnie Sahlberg <ronniesahlberg@gmail.com>

test-tool/iscsi-support.c

@@ -2939,6 +2939,9 @@ void populate_ident_tgt_desc(unsigned char *buf, struct scsi_device *dev)
                                 tgt_desig = desig;
                                 prev_type = desig->designator_type;
                         }
+                        continue;
+                default:
+                        continue;
                 }
         }
         if (tgt_desig == NULL) {