Merge pull request #1332 from jawshooah/cask/list-no-init

hbc/cli/list: don't require Caskroom to be initialized

Library/Homebrew/cask/lib/hbc/cli/list.rb

@@ -67,7 +67,7 @@ module Hbc
           puts installed_casks.map(&:to_s)
         elsif @options[:versions]
           puts installed_casks.map(&method(:format_versioned))
-        else
+        elsif !installed_casks.empty?
           puts Formatter.columns(installed_casks.map(&:to_s))
         end
 
@@ -83,7 +83,7 @@ module Hbc
       end
 
       def self.needs_init?
-        true
+        false
       end
     end
   end