[wallet] factor out GetAvailableWatchOnlyBalance()

src/wallet/wallet.cpp

@@ -2026,11 +2026,6 @@ CAmount CWalletTx::GetImmatureWatchOnlyCredit(const bool fUseCache) const
     return 0;
 }
 
-CAmount CWalletTx::GetAvailableWatchOnlyCredit(const bool fUseCache) const
-{
-    return GetAvailableCredit(fUseCache, ISMINE_WATCH_ONLY);
-}
-
 CAmount CWalletTx::GetChange() const
 {
     if (fChangeCached)
@@ -2199,7 +2194,7 @@ CAmount CWallet::GetUnconfirmedWatchOnlyBalance() const
         {
             const CWalletTx* pcoin = &entry.second;
             if (!pcoin->IsTrusted() && pcoin->GetDepthInMainChain() == 0 && pcoin->InMempool())
-                nTotal += pcoin->GetAvailableWatchOnlyCredit();
+                nTotal += pcoin->GetAvailableCredit(true, ISMINE_WATCH_ONLY);
         }
     }
     return nTotal;

src/wallet/wallet.h

@@ -462,7 +462,6 @@ public:
     CAmount GetImmatureCredit(bool fUseCache=true) const;
     CAmount GetAvailableCredit(bool fUseCache=true, const isminefilter& filter=ISMINE_SPENDABLE) const;
     CAmount GetImmatureWatchOnlyCredit(const bool fUseCache=true) const;
-    CAmount GetAvailableWatchOnlyCredit(const bool fUseCache=true) const;
     CAmount GetChange() const;
 
     // Get the marginal bytes if spending the specified output from this transaction