interfaces: Fix const virtual method that breaks multiprocess support

Author: ryanofsky

src/interfaces/wallet.h

@@ -118,7 +118,7 @@ class Wallet
         wallet::AddressPurpose* purpose) = 0;
 
     //! Get wallet address list.
-    virtual std::vector<WalletAddress> getAddresses() const = 0;
+    virtual std::vector<WalletAddress> getAddresses() = 0;
 
     //! Get receive requests.
     virtual std::vector<std::string> getAddressReceiveRequests() = 0;

src/wallet/interfaces.cpp

@@ -212,7 +212,7 @@ class WalletImpl : public Wallet
         }
         return true;
     }
-    std::vector<WalletAddress> getAddresses() const override
+    std::vector<WalletAddress> getAddresses() override
     {
         LOCK(m_wallet->cs_wallet);
         std::vector<WalletAddress> result;