[bsc_init] Send OPSTART if SITE_MANAGER reports off-line

The exact sequence the states the BTS goes through is slightly
different for one of the nanoBTS 139 I have and it needs this
to start.

Signed-off-by: Sylvain Munaut <tnt@246tNt.com>
diff --git a/openbsc/src/bsc_init.c b/openbsc/src/bsc_init.c
index ee81b6a..622fb98 100644
--- a/openbsc/src/bsc_init.c
+++ b/openbsc/src/bsc_init.c
@@ -355,8 +355,10 @@
 	switch (obj_class) {
 	case NM_OC_SITE_MANAGER:
 		bts = container_of(obj, struct gsm_bts, site_mgr);
-		if (new_state->operational == 2 &&
-		    new_state->availability == NM_AVSTATE_OK)
+		if ((new_state->operational == 2 &&
+		     new_state->availability == NM_AVSTATE_OK) ||
+		    (new_state->operational == 1 &&
+		     new_state->availability == NM_AVSTATE_OFF_LINE))
 			abis_nm_opstart(bts, obj_class, 0xff, 0xff, 0xff);
 		break;
 	case NM_OC_BTS: