Merge branch 'develop' of github.com:apertureless/vue-chartjs into develop

* 'develop' of github.com:apertureless/vue-chartjs:
  Fix beforeDestory when renderChart was not called

src/BaseCharts/Bar.js

@@ -79,6 +79,8 @@ export default Vue.extend({
     }
   },
   beforeDestroy () {
-    this._chart.destroy()
+    if (this._chart) {
+      this._chart.destroy()
+    }
   }
 })

src/BaseCharts/Bubble.js

@@ -80,6 +80,8 @@ export default Vue.extend({
     }
   },
   beforeDestroy () {
-    this._chart.destroy()
+    if (this._chart) {
+      this._chart.destroy()
+    }
   }
 })

src/BaseCharts/Doughnut.js

@@ -63,6 +63,8 @@ export default Vue.extend({
     }
   },
   beforeDestroy () {
-    this._chart.destroy()
+    if (this._chart) {
+      this._chart.destroy()
+    }
   }
 })

src/BaseCharts/HorizontalBar.js

@@ -79,6 +79,8 @@ export default Vue.extend({
     }
   },
   beforeDestroy () {
-    this._chart.destroy()
+    if (this._chart) {
+      this._chart.destroy()
+    }
   }
 })

src/BaseCharts/Line.js

@@ -78,6 +78,8 @@ export default Vue.extend({
     }
   },
   beforeDestroy () {
-    this._chart.destroy()
+    if (this._chart) {
+      this._chart.destroy()
+    }
   }
 })

src/BaseCharts/Pie.js

@@ -63,6 +63,8 @@ export default Vue.extend({
     }
   },
   beforeDestroy () {
-    this._chart.destroy()
+    if (this._chart) {
+      this._chart.destroy()
+    }
   }
 })

src/BaseCharts/PolarArea.js

@@ -63,6 +63,8 @@ export default Vue.extend({
     }
   },
   beforeDestroy () {
-    this._chart.destroy()
+    if (this._chart) {
+      this._chart.destroy()
+    }
   }
 })

src/BaseCharts/Radar.js

@@ -63,6 +63,8 @@ export default Vue.extend({
     }
   },
   beforeDestroy () {
-    this._chart.destroy()
+    if (this._chart) {
+      this._chart.destroy()
+    }
   }
 })

src/BaseCharts/Scatter.js

@@ -69,6 +69,8 @@ export default Vue.extend({
     }
   },
   beforeDestroy () {
-    this._chart.destroy()
+    if (this._chart) {
+      this._chart.destroy()
+    }
   }
 })