Fix normalize when null values at edge of dataset (#8547)

* Fix normalize when null values at edge of dataset

* Fix test with mismatched number of points

Author: benmccann

src/core/core.datasetController.js

@@ -566,7 +566,7 @@ export default class DatasetController {
       parsed = _parsed[i];
       value = parsed[scale.axis];
       otherValue = parsed[otherScale.axis];
-      return (!isFinite(value) || !isFinite(otherValue) || otherMin > otherValue || otherMax < otherValue);
+      return !isFinite(value) || otherMin > otherValue || otherMax < otherValue;
     }
 
     for (i = 0; i < ilen; ++i) {

test/fixtures/scale.time/ticks-reverse-linear.js

@@ -4,7 +4,7 @@ module.exports = {
     type: 'line',
     data: {
       labels: ['2017', '2019', '2020', '2025', '2042'],
-      datasets: [{data: [0, 1, 2, 3, 4, 5], fill: false}]
+      datasets: [{data: [0, 1, 2, 3, 4], fill: false}]
     },
     options: {
       scales: {