Calling UnregisterAllWallets() instead of UnregisterWallet(pwalletMain) in init.cpp

src/init.cpp

@@ -119,7 +119,7 @@ void Shutdown()
     }
     bitdb.Flush(true);
     boost::filesystem::remove(GetPidFile());
-    UnregisterWallet(pwalletMain);
+    UnregisterAllWallets();
     delete pwalletMain;
 }