Simplify condition for aborting people.reify().

Since it's basically impossible to add a person with an
undefined full_name--even "skeleton" people--there is no
need to check the full_name field to short circuit reify(),
because it will always be defined.

(imported from commit 3a30cfd583a040f7460739abea1604594c450ffe)

static/js/people.js

@@ -89,9 +89,9 @@ exports.reify = function reify(person) {
 
     var old_person = people_dict.get(person.email);
 
-    // Don't overwrite an already-reified person. If we have
-    // a full name, we already have the full person object loaded
-    if (old_person.full_name !== undefined && !old_person.skeleton) {
+    // Only overwrite skeleton objects here.  If the object
+    // had already been reified, exit early.
+    if (!old_person.skeleton) {
         return;
     }