msc: Set talloc ctx for osmo_signal structures

Otherwise they end up in the NULL ctx.

Depends: libosmocore Change-Id Id58ca18eb826b8f4183a7cf0dbb2b38cba702a09

Change-Id: I5d5b456eb85fbdb0ca2140c56ebf3d207b4a0bba
diff --git a/src/osmo-msc/msc_main.c b/src/osmo-msc/msc_main.c
index 1a10278..f87a95e 100644
--- a/src/osmo-msc/msc_main.c
+++ b/src/osmo-msc/msc_main.c
@@ -530,6 +530,7 @@
 	msc_vty_info.tall_ctx = tall_msc_ctx;
 
 	msgb_talloc_ctx_init(tall_msc_ctx, 0);
+	osmo_signal_talloc_ctx_init(tall_msc_ctx);
 	tall_gsms_ctx = talloc_named_const(tall_msc_ctx, 0, "sms");
 	tall_call_ctx = talloc_named_const(tall_msc_ctx, 0, "gsm_call");
 	tall_trans_ctx = talloc_named_const(tall_msc_ctx, 0, "transaction");