Fix proxy breakage with attempting to validate btcaddress that isn't used

src/stratifier.c

@@ -2594,6 +2594,7 @@ int stratifier(proc_instance_t *pi)
 		buf = send_recv_proc(ckp->generator, "ping");
 	} while (!buf);
 
+	if (!ckp->proxy) {
 		if (!test_address(ckp, ckp->btcaddress)) {
 			LOGEMERG("Fatal: btcaddress invalid according to bitcoind");
 			goto out;
@@ -2607,6 +2608,7 @@ int stratifier(proc_instance_t *pi)
 			ckp->donvalid = true;
 			address_to_pubkeytxn(donkeytxnbin, ckp->donaddress);
 		}
+	}
 
 	/* Set the initial id to time as high bits so as to not send the same
 	 * id on restarts */