fix(lnd): don't check for manual unlock

This is a workaround fix to prevent unexplained crashes in lnd after
it is unlocked. It prevents lnd from checking if it is manually unlocked
outside of xud. The downside is that if lnd is unlocked while xud is
running, xud won't be aware.

Author: sangaman

Diff for: lib/lndclient/LndClient.ts

@@ -433,6 +433,10 @@ class LndClient extends SwapClient {
     if (!this.isOperational()) {
       throw(errors.DISABLED);
     }
+    if (this.isWaitingUnlock()) {
+      return; // temporary workaround to prevent unexplained lnd crashes after unlock
+    }
+
     if (this.macaroonpath && this.meta.get('macaroon').length === 0) {
       // we have not loaded the macaroon yet - it is not created until the lnd wallet is initialized
       if (!this.isWaitingUnlock()) { // check that we are not already waiting for wallet init & unlock