[rpcwallet] Don't use floating point

src/wallet/rpcwallet.cpp

@@ -616,8 +616,8 @@ UniValue getreceivedbyaddress(const UniValue& params, bool fHelp)
     if (!address.IsValid())
         throw JSONRPCError(RPC_INVALID_ADDRESS_OR_KEY, "Invalid Bitcoin address");
     CScript scriptPubKey = GetScriptForDestination(address.Get());
-    if (!IsMine(*pwalletMain,scriptPubKey))
-        return (double)0.0;
+    if (!IsMine(*pwalletMain, scriptPubKey))
+        return ValueFromAmount(0);
 
     // Minimum confirmations
     int nMinDepth = 1;
@@ -697,7 +697,7 @@ UniValue getreceivedbyaccount(const UniValue& params, bool fHelp)
         }
     }
 
-    return (double)nAmount / (double)COIN;
+    return ValueFromAmount(nAmount);
 }