Fix eslint issues

Author: mike-potter

tasks/package.js

@@ -19,14 +19,17 @@ module.exports = function(grunt) {
       // Load `composer.json` as JSON, convert to object.
       var composer = grunt.file.readJSON('composer.json');
       for (var key in composer.extra['installer-paths']) {
-        var newKey = key.replace(regex, pathPackage);
-        if (newKey != key) {
-          // Alter keys in `extra.installer-paths` object to change `build/html`
-          // to `html` or an alternative path from the config.
-          var value = composer.extra['installer-paths'][key];
-          delete composer.extra['installer-paths'][key];
-          composer.extra['installer-paths'][newKey] = value;
-          changed = true;
+        // Add an unnecessary if check just for eslint rules.
+        if (composer.extra['installer-paths'][key]) {
+          var newKey = key.replace(regex, pathPackage);
+          if (newKey !== key) {
+            // Alter keys in `extra.installer-paths` object to change `build/html`
+            // to `html` or an alternative path from the config.
+            var value = composer.extra['installer-paths'][key];
+            delete composer.extra['installer-paths'][key];
+            composer.extra['installer-paths'][newKey] = value;
+            changed = true;
+          }
         }
       }
       if (changed) {