Fix check for undefined

Use '!==' instead of '!='. This fixes eqeqeq error reported by gulp-eslint.

diff --git a/src/scales/scale.time.js b/src/scales/scale.time.js
index f88fea19ac7e0f831935d95078bb938d28744841..8032b960d9ff88ded38addeceb7ad949695f2145 100755 (executable)
--- a/src/scales/scale.time.js
+++ b/src/scales/scale.time.js
@@ -96,7 +96,7 @@ module.exports = function(Chart) {
                                me.buildLabelDiffs();
                        }
 
-                       if (typeof me.labelDiffs[datasetIndex] != 'undefined') {
+                       if (typeof me.labelDiffs[datasetIndex] !== 'undefined') {
                                return me.labelDiffs[datasetIndex][index];
                        }