Added back axisY inner

This commit readd back the axisY option

src/size.js

@@ -22,7 +22,7 @@ c3_chart_internal_fn.getCurrentPaddingLeft = function (withoutRecompute) {
     } else if (config.axis_rotated) {
         return !config.axis_x_show ? 1 : Math.max(ceil10($$.getAxisWidthByAxisId('x', withoutRecompute)), 40);
     } else {
-        return !config.axis_y_show ? 1 : ceil10($$.getAxisWidthByAxisId('y', withoutRecompute));
+        return !config.axis_y_show || config.axis_y_inner ? 1 : ceil10($$.getAxisWidthByAxisId('y', withoutRecompute));
     }
 };
 c3_chart_internal_fn.getCurrentPaddingRight = function () {
@@ -33,7 +33,7 @@ c3_chart_internal_fn.getCurrentPaddingRight = function () {
     } else if (config.axis_rotated) {
         return defaultPadding + legendWidthOnRight;
     } else {
-        return (!config.axis_y2_show ? defaultPadding : ceil10($$.getAxisWidthByAxisId('y2'))) + legendWidthOnRight;
+        return (!config.axis_y2_show || config.axis_y2_inner ? defaultPadding : ceil10($$.getAxisWidthByAxisId('y2'))) + legendWidthOnRight;
     }
 };