fix: null balance deleting check

lib/screens/myWallets/wallet_options.dart

@@ -500,7 +500,8 @@ class WalletOptions extends StatelessWidget {
               _hasConsumers.hasError) {
             return const Text('');
           }
-          final double _balance = balanceCache[walletProvider.address.text]!;
+          final double _balance =
+              balanceCache[walletProvider.address.text] ?? 0;
           final bool canDelete = !isDefaultWallet &&
               !_hasConsumers.data! &&
               (_balance > 2 || _balance == 0);

pubspec.yaml

@@ -5,7 +5,7 @@ description: Pay with G1.
 # pub.dev using `pub publish`. This is preferred for private packages.
 publish_to: 'none' # Remove this line if you wish to publish to pub.dev
 
-version: 0.0.8+6
+version: 0.0.8+7
 
 environment:
   sdk: '>=2.12.0 <3.0.0'