Bugfix: Skip coinbaser if CoinbaserCmd is None
Bugfix: Skip coinbaser if CoinbaserCmd is None

thrasher-/eloipool,thrasher-/eloipool,wizkid057/eloipool,uingei/eloipool,pointgaming/point-gaming-btc,thrasher-/eloipool,imsaguy/eloipool,ahmedbodi/SHA-Eloipool-MMCFE-,svasva/eloipool,jameshilliard/4tar-eloipool,uingei/eloi,cinnamoncoin/eloipool-1