Merge pull request #162 from dudukee/master

fix error shows in special type chart

sample/src/main/java/com/github/aachartmodel/aainfographics/demo/basiccontent/MainActivity.kt

@@ -226,19 +226,20 @@ class MainActivity : AppCompatActivity() {
                 AAChartType.Bar.value,
                 AAChartType.Line.value,
                 AAChartType.Area.value,
+                AAChartType.Spline.value,
+                AAChartType.Areaspline.value,
                 AAChartType.Pie.value,
                 AAChartType.Bubble.value,
                 AAChartType.Scatter.value,
                 AAChartType.Arearange.value,
                 AAChartType.Columnrange.value,
-                AAChartType.Spline.value,
-                AAChartType.Areaspline.value,
                 AAChartType.Boxplot.value,
                 AAChartType.Waterfall.value,
                 AAChartType.Pyramid.value,
                 AAChartType.Funnel.value,
                 AAChartType.Errorbar.value,
                 AAChartType.Gauge.value,
+                AAChartType.Polygon.value,
             ), arrayOf(
                 /*Mixed Chart---混合图*/
                 "arearangeMixedLine",