Allow null/undefined co-ords in legend

v1.01 - Some external code had been written with required parameters
missing from addLegend.  This fix is to allow these charts to continue
to work.

dist/dimple.v1.js

@@ -3884,7 +3884,9 @@ var dimple = {
     // Source: /src/methods/_parsePosition.js
     dimple._parsePosition = function (value, svgScaleValue) {
         var returnValue = value;
-        if (!isNaN(value)) {
+        if (value === undefined || value === null) {
+            returnValue = 0;
+        } else if (!isNaN(value)) {
             returnValue = value;
         } else if (value.slice(-1) === "%") {
             returnValue = svgScaleValue * (parseFloat(value.slice(0, value.length - 1)) / 100);

package.json

@@ -1,6 +1,6 @@
 {
   "name": "dimple",
-  "version": "1.0.0",
+  "version": "1.0.1",
   "private": true,
   "licenses": [
     {

src/methods/_parsePosition.js

@@ -3,7 +3,9 @@
     // Source: /src/methods/_parsePosition.js
     dimple._parsePosition = function (value, svgScaleValue) {
         var returnValue = value;
-        if (!isNaN(value)) {
+        if (value === undefined || value === null) {
+            returnValue = 0;
+        } else if (!isNaN(value)) {
             returnValue = value;
         } else if (value.slice(-1) === "%") {
             returnValue = svgScaleValue * (parseFloat(value.slice(0, value.length - 1)) / 100);