Bump version

Author: compwright

chartjs-plugin-annotation.js

@@ -1,7 +1,7 @@
 /*!
  * chartjs-plugin-annotation.js
  * http://chartjs.org/
- * Version: 0.5.5
+ * Version: 0.5.6
  *
  * Copyright 2016 Evert Timberg
  * Released under the MIT license
@@ -525,7 +525,10 @@ module.exports = function(Chart) {
 
 			// Set the data range for this annotation
 			model.ranges = {};
-
+			
+			var min = 0;
+			var max = 0;
+			
 			if (xScale) {
 				min = helpers.isValid(options.xMin) ? options.xMin : xScale.getPixelForValue(chartArea.left);
 				max = helpers.isValid(options.xMax) ? options.xMax : xScale.getPixelForValue(chartArea.right);