Fixed broken link on startpage for non ordergroup members.

app/controllers/home_controller.rb

@@ -35,6 +35,8 @@ class HomeController < ApplicationController
   def ordergroup
     @user = @current_user
     @ordergroup = @user.ordergroup
+
+    unless @ordergroup.nil?
       @ordergroup_column_names = ["Description", "Actual Size", "Balance", "Updated"]
       @ordergroup_columns = ["description", "account_balance", "account_updated"]
 
@@ -65,6 +67,10 @@ class HomeController < ApplicationController
         format.html # myOrdergroup.haml
         format.js { render :partial => "finance/transactions/list" }
       end
+    else
+      flash[:error] = "Leider bist Du kein Mitglied einer Bestellgruppe"
+      redirect_to root_path
+    end
   end
 
   # cancel personal memberships direct from the myProfile-page