added stake cache + checked ismine

src/wallet/wallet.h

@@ -932,6 +932,7 @@ public:
 
     /* Set the current HD master key (will reset the chain child index counters) */
     bool SetHDMasterKey(const CPubKey& key);
+    static const bool DEFAULT_STAKE_CACHE = true;
 };
 
 /** A key allocated from the key pool. */
@@ -989,5 +990,4 @@ public:
     }
 };
 
-bool CheckKernel(CBlockIndex* pindexPrev, unsigned int nBits, int64_t nTime, const COutPoint& prevout, int64_t* pBlockTime = NULL);
 #endif // BITCOIN_WALLET_WALLET_H