Fix for issue #75518 - ListTile.divideTiles throws error if empty list is...

Fix for issue #75518 - ListTile.divideTiles throws error if empty list is passed when null-safety enabled (#75522)

packages/flutter/lib/src/material/list_tile.dart

@@ -982,6 +982,9 @@ class ListTile extends StatelessWidget {
     assert(tiles != null);
     assert(color != null || context != null);
 
+    if (tiles.isEmpty)
+      return;
+
     final Iterator<Widget> iterator = tiles.iterator;
     final bool isNotEmpty = iterator.moveNext();
 

packages/flutter/test/material/list_tile_test.dart

@@ -252,6 +252,11 @@ void main() {
     expect(find.text('third'), findsOneWidget);
   });
 
+  testWidgets('ListTile.divideTiles with empty list', (WidgetTester tester) async {
+    final Iterable<Widget> output = ListTile.divideTiles(tiles: <Widget>[], color: Colors.grey);
+    expect(output, isEmpty);
+  });
+
   testWidgets('ListTileTheme', (WidgetTester tester) async {
     final Key titleKey = UniqueKey();
     final Key subtitleKey = UniqueKey();