Merge PIVX-Project#1458: [Bug] Fix min depth requirement for stake in…

…puts in AvailableCoins

f2d31e5 [Bug] Fix min depth requirement for stake inputs in AvailableCoins (random-zebra)

Pull request description:

  If `nDepth` is equal to `nStakeMinDepth - 1` then the coin is not skipped in `AvailableCoins` and gets included in the list of stakeable utxos.
  This utxo won't be able to stake though, as it will fail `ContextCheck` in `Stake()` (logging an error), thus it shouldn't have been included in the first place.

ACKs for top commit:
  furszy:
    ACK f2d31e5 .
  Fuzzbawls:
    ACK f2d31e5

Tree-SHA512: 1b75a555e9ad4d2526fdc49e9059baaed1c383b6abc121f9cd85c48f44f82b21e13e8ee66f6d535c078f226360f93fd12ebf1889124acb74c0e7fcc17464dad7

src/wallet/wallet.cpp

@@ -2264,7 +2264,7 @@ bool CWallet::AvailableCoins(
             if (nDepth == 0 && !pcoin->InMempool()) continue;
 
             // Check min depth requirement for stake inputs
-            if (nCoinType == STAKEABLE_COINS && nDepth < Params().GetConsensus().nStakeMinDepth - 1) continue;
+            if (nCoinType == STAKEABLE_COINS && nDepth < Params().GetConsensus().nStakeMinDepth) continue;
 
             for (unsigned int i = 0; i < pcoin->vout.size(); i++) {
                 bool found = false;