message: Update error msgs
diff: @@ -2827,7 +2827,7 @@ UniValue mintmanyzerocoin(const UniValue& params, bool fHelp)
  break;
  default:
  throw runtime_error(
  - "mintmanyzerocoin <amount>(1,10,25,50,100) (\"zcoinaddress\")\n");
  + "denomination must be one of (1,10,25,50,100)\n");
  }
  @@ -2838,7 +2838,7 @@ UniValue mintmanyzerocoin(const UniValue& params, bool fHelp)
  if(amount < 0){
  throw runtime_error(
  - "mintmanyzerocoin {<denomination>(1,10,25,50,100):\"amount\"...}\n");
  + "amounts must be greater than 0.\n");
  }
  for(int64_t i=0; i<amount; i++){
  