Merge #726: Register wallet::AddressPurpose type

a45b544 qt: Register `wallet::AddressPurpose` type (Hennadii Stepanov)

Pull request description:

  This PR is a follow up of bitcoin/bitcoin#27217.

  Fixes #725.

ACKs for top commit:
  achow101:
    ACK a45b544
  furszy:
    Tested ACK a45b544

Tree-SHA512: c670f4bf56442613d3fe038b0ba21acfcd4c69aa5340072e9a77d83f5fab1bf2facd87a9e1f42d88f496d277b27b79e7090444d59a9b9e71f3b486e171daa669

Author: hebasto

src/qt/bitcoin.cpp

@@ -40,6 +40,7 @@
 #include <qt/paymentserver.h>
 #include <qt/walletcontroller.h>
 #include <qt/walletmodel.h>
+#include <wallet/types.h>
 #endif // ENABLE_WALLET
 
 #include <boost/signals2/connection.hpp>
@@ -79,6 +80,9 @@ Q_DECLARE_METATYPE(CAmount)
 Q_DECLARE_METATYPE(SynchronizationState)
 Q_DECLARE_METATYPE(SyncType)
 Q_DECLARE_METATYPE(uint256)
+#ifdef ENABLE_WALLET
+Q_DECLARE_METATYPE(wallet::AddressPurpose)
+#endif // ENABLE_WALLET
 
 static void RegisterMetaTypes()
 {
@@ -88,7 +92,8 @@ static void RegisterMetaTypes()
     qRegisterMetaType<SyncType>();
   #ifdef ENABLE_WALLET
     qRegisterMetaType<WalletModel*>();
-  #endif
+    qRegisterMetaType<wallet::AddressPurpose>();
+  #endif // ENABLE_WALLET
     // Register typedefs (see https://doc.qt.io/qt-5/qmetatype.html#qRegisterMetaType)
     // IMPORTANT: if CAmount is no longer a typedef use the normal variant above (see https://doc.qt.io/qt-5/qmetatype.html#qRegisterMetaType-1)
     qRegisterMetaType<CAmount>("CAmount");