BUGFIX: blank name causes SSO to explode

spec/models/discourse_single_sign_on_spec.rb

@@ -34,6 +34,18 @@ describe DiscourseSingleSignOn do
     parsed.custom_fields["b.b"].should == "B.b"
   end
 
+  it "can lookup or create user when name is blank" do
+    # so we can create system messages
+    Fabricate(:admin)
+    sso = DiscourseSingleSignOn.new
+    sso.username = "test"
+    sso.name = ""
+    sso.email = "test@test.com"
+    sso.external_id = "A"
+    user = sso.lookup_or_create_user
+    user.should_not == nil
+  end
+
   it "can fill in data on way back" do
     sso = make_sso