splice: serialize inflight is_locked field

This field should be serialized for communication between channeld and lightningd.

Author: ddustin

channeld/inflight.c

@@ -25,6 +25,7 @@ struct inflight *fromwire_inflight(const tal_t *ctx, const u8 **cursor, size_t *
 	}
 	inflight->i_am_initiator = fromwire_bool(cursor, max);
 	inflight->force_sign_first = fromwire_bool(cursor, max);
+	inflight->is_locked = fromwire_bool(cursor, max);
 
 	return inflight;
 }
@@ -44,4 +45,5 @@ void towire_inflight(u8 **pptr, const struct inflight *inflight)
 	}
 	towire_bool(pptr, inflight->i_am_initiator);
 	towire_bool(pptr, inflight->force_sign_first);
+	towire_bool(pptr, inflight->is_locked);
 }

channeld/inflight.h

@@ -7,6 +7,7 @@
 #include <common/amount.h>
 
 struct inflight {
+	/* The new channel outpoint */
 	struct bitcoin_outpoint outpoint;
 	struct pubkey remote_funding;
 	struct amount_sat amnt;