Fix update scale

src/scale.js

@@ -53,8 +53,9 @@ c3_chart_internal_fn.updateScales = function () {
     var $$ = this, config = $$.config,
         forInit = !$$.x;                
     // update edges
-    $$.xMin = config.axis_rotated ? 1 : 0;
-    $$.xMax = config.axis_rotated ? $$.height : $$.width;
+    $$.xMin = config.axis_rotated ? $$.height : 0;
+    $$.xMax = config.axis_rotated ? 0 : $$.width;
+
     $$.yMin = config.axis_rotated ? 0 : $$.height;
     $$.yMax = config.axis_rotated ? $$.width : 1;
     $$.subXMin = $$.xMin;