Updated charted DEP to 0.4.X

packages/charted/lib/locale/format/number_format.dart

Index: packages/charted/lib/locale/format/number_format.dart
diff --git a/packages/charted/lib/locale/format/number_format.dart b/packages/charted/lib/locale/format/number_format.dart
index 5761e2bcf86efee4ff3135be36e350303dea16ab..9e938f9990f84d00b2859cef79a0373ff9811860 100644
--- a/packages/charted/lib/locale/format/number_format.dart
+++ b/packages/charted/lib/locale/format/number_format.dart
@@ -186,13 +186,13 @@ class NumberFormat {
         before = formatGroup(before);
       }
 
-      var length = prefix.length +
-              before.length +
-              after.length +
-              (zcomma ? 0 : negative.length),
-          padding = length < width
-              ? new List.filled((length = width - length + 1), '').join(fill)
-              : '';
+      int length = prefix.length +
+          before.length +
+          after.length +
+          (zcomma ? 0 : negative.length);
+      var padding = length < width
+          ? new List.filled((length = width - length + 1), '').join(fill)
+          : '';
 
       // If the fill character is '0', grouping is applied after padding.
       if (zcomma) {