Don't error too early when config.vm.box is not properly set

CHANGELOG.md

@@ -17,6 +17,7 @@ BUG FIXES:
     quickly. [GH-1505]
   - Error message if private key for SSH isn't owned by the proper
     user. [GH-1503]
+  - Don't error too early when `config.vm.box` is not properly set.
 
 ## 1.1.4 (March 25, 2013)
 

lib/vagrant/environment.rb

@@ -302,6 +302,7 @@ module Vagrant
         @config_loader.load([:default, :home, :root, vm_config_key])
 
       box = nil
+      if config.vm.box
         begin
           box = boxes.find(config.vm.box, provider)
         rescue Errors::BoxUpgradeRequired
@@ -310,6 +311,7 @@ module Vagrant
           boxes.upgrade(config.vm.box)
           retry
         end
+      end
 
       # If a box was found, then we attempt to load the Vagrantfile for
       # that box. We don't require a box since we allow providers to download