Fix oracles 'd' and 'D'

src/cc/import.cpp

@@ -146,7 +146,7 @@ bool Eval::ImportCoin(const std::vector<uint8_t> params,const CTransaction &impo
         for (int i=0; i<importTx.vout.size(); i++)
             totalOut += importTx.vout[i].nValue;
         if (totalOut > burnAmount || totalOut < burnAmount-txfee )
-            return Invalid("payout-too-high");
+            return Invalid("payout-too-high-or-too-low");
     }
     // Check burntx shows correct outputs hash
     if (payoutsHash != SerializeHash(payouts))

src/cc/oracles.cpp

@@ -370,7 +370,7 @@ int32_t oracle_format(uint256 *hashp,int64_t *valp,char *str,uint8_t fmt,uint8_t
             {
                 for (i=0; i<dlen; i++)
                     sprintf(&str[i<<1],"%02x",data[offset++]);
-                str[i] = 0;
+                str[i<<1] = 0;
             } else return(-1);
         }
     }