fix cold staking report (#425)

* fix cold staking report

* use cached credit from coin

* check separated flags

Author: alex v

src/wallet/rpcwallet.cpp

@@ -3165,10 +3165,10 @@ int GetsStakeSubTotal(vStakePeriodRange_T& aRange)
         nElement++;
 
         // use the cached amount if available
-        if (pcoin->fCreditCached && pcoin->fDebitCached)
-            nAmount = pcoin->nCreditCached - pcoin->nDebitCached;
+        if ((pcoin->fCreditCached || pcoin->fColdStakingCreditCached) && (pcoin->fDebitCached || pcoin->fColdStakingDebitCached))
+            nAmount = pcoin->nCreditCached  + pcoin->nColdStakingCreditCached - pcoin->nDebitCached - pcoin->nColdStakingDebitCached;
         else
-            nAmount = pcoin->GetCredit(ISMINE_SPENDABLE) - pcoin->GetDebit(ISMINE_SPENDABLE);
+            nAmount = pcoin->GetCredit(ISMINE_SPENDABLE) + pcoin->GetCredit(ISMINE_STAKABLE) - pcoin->GetDebit(ISMINE_SPENDABLE) - pcoin->GetDebit(ISMINE_STAKABLE);
 
 
         // scan the range