Fix negative stake reward
Fix negative stake reward

MaxGuevara/quark,quark-project/quark,quark-project/quark,MaxGuevara/quark,MaxGuevara/quark,quark-project/quark,MaxGuevara/quark,quark-project/quark,MaxGuevara/quark,MaxGuevara/quark,quark-project/quark,quark-project/quark