more first_name fixing

app/models/person.rb

@@ -154,7 +154,9 @@ class Person < ActiveRecord::Base
                 self.diaspora_handle.split('@').first
               else
                 names = profile.first_name.to_s.split(/\s/)
-                names[0...-1].join(' ')
+                str = names[0...-1].join(' ')
+                str = names[0] if str.blank?
+                str
               end
   end
 

spec/models/person_spec.rb

@@ -281,6 +281,16 @@ describe Person do
       alice.person.profile.update_attributes(:first_name => "First Mid Last")
       alice.person.first_name.should == "First Mid"
     end
+
+    it 'returns first word in first_name if first_name is present' do
+      alice.person.profile.update_attributes(:first_name => "Alice Smith")
+      alice.person.first_name.should == "Alice"
+    end
+
+    it 'returns first word in first_name if first_name is present' do
+      alice.person.profile.update_attributes(:first_name => "Alice")
+      alice.person.first_name.should == "Alice"
+    end
   end
 
   describe '.search' do