JOKER: Fix potential TTL bug

# Issue

`golangci-lint` reports:

```
providers/joker/records.go:233:8: ineffectual assignment to ttl (ineffassign)
							ttl = uint32(ttlParsed)
							^
providers/joker/records.go:269:7: ineffectual assignment to ttl (ineffassign)
						ttl = uint32(ttlParsed)
						^
```

In other words... `ttl` is being set but the result is never used.

# Resolution

Please fix

CC @atrull 