lightningd: use channel_coin_mvt / chain_coin_mvt directly for notifications.

Rather than converting to a generic coin_mvt struct, use these directly in
the notification, which is more explicit.

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>

lightningd/peer_htlcs.c

@@ -18,6 +18,7 @@
 #include <lightningd/chaintopology.h>
 #include <lightningd/channel.h>
 #include <lightningd/coin_mvts.h>
+#include <lightningd/notification.h>
 #include <lightningd/pay.h>
 #include <lightningd/peer_control.h>
 #include <lightningd/peer_htlcs.h>