bsc_init: Compare it with the right enum type

In both cases the int value was zero, so it actually worked
diff --git a/openbsc/src/bsc_init.c b/openbsc/src/bsc_init.c
index 7d9a520..2d92b42 100644
--- a/openbsc/src/bsc_init.c
+++ b/openbsc/src/bsc_init.c
@@ -1057,7 +1057,7 @@
 			struct gsm_bts_trx_ts *ts = &trx->ts[ts_no];
 
 			for (lchan_no = 0; lchan_no < ARRAY_SIZE(ts->lchan); ++lchan_no) {
-				if (ts->lchan[lchan_no].state != GSM_LCHAN_NONE)
+				if (ts->lchan[lchan_no].state != LCHAN_S_NONE)
 					lchan_free(&ts->lchan[lchan_no]);
 				lchan_reset(&ts->lchan[lchan_no]);
 			}