David PHAM-VAN

Add assert on GridView

@@ -59,6 +59,7 @@ class GridView extends MultiChildWidget implements SpanningWidget { @@ -59,6 +59,7 @@ class GridView extends MultiChildWidget implements SpanningWidget {
59 this.childAspectRatio = double.infinity, 59 this.childAspectRatio = double.infinity,
60 List<Widget> children = const <Widget>[]}) 60 List<Widget> children = const <Widget>[]})
61 : assert(padding != null), 61 : assert(padding != null),
  62 + assert(crossAxisCount != null),
62 super(children: children); 63 super(children: children);
63 64
64 final Axis direction; 65 final Axis direction;