fix(location): clarify index null check

Author: landonreed

lib/components/form/location-field.js

@@ -179,11 +179,11 @@ class LocationField extends Component {
 
       // 'Enter' keypress serves two purposes:
       //  - If pressed when typing in search string, switch from 'autocomplete'
-      //    to 'search' geocosing
+      //    to 'search' geocoding
       //  - If pressed when dropdown results menu is active, apply the location
       //    associated with current selected menu item
       case 'Enter':
-        if (activeIndex) { // Menu is active
+        if (typeof activeIndex === 'number') { // Menu is active
           // Retrieve location selection handler from lookup object and invoke
           const locationSelected = this.locationSelectedLookup[activeIndex]
           if (locationSelected) locationSelected()