spelling fix

src/chart/bar.js

@@ -43,7 +43,7 @@ define(function (require) {
          * 绘制图形
          */
         _buildShape: function () {
-            this._bulidPosition();
+            this._buildPosition();
         },
         
         _buildNormal: function(seriesArray, maxDataLength, locationMap, xMarkMap, orient) {

src/chart/base.js

@@ -250,7 +250,7 @@ define(function (require) {
         /**
          * 折线图、柱形图公用方法
          */
-        _bulidPosition: function() {
+        _buildPosition: function() {
             this._symbol = this.option.symbolList;
             this._sIndex2ShapeMap = {};  // series拐点图形类型，seriesIndex索引到shape type
             this._sIndex2ColorMap = {};  // series默认颜色索引，seriesIndex索引到color

src/chart/line.js

@@ -46,7 +46,7 @@ define(function (require) {
          */
         _buildShape: function () {
             this.finalPLMap = {}; // 完成的point list(PL)
-            this._bulidPosition();
+            this._buildPosition();
         },
 
         /**