Avoid theme rescan when no theme is selected.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@4559 e93f8b46-1217-0410-a6f0-8f06a7374b81

diff --git a/lib/redmine/themes.rb b/lib/redmine/themes.rb
index 2b38ec517839d1fb4c2dca5fd204ce7dfa0e2894..77833cb35ea68c73ab8416cabc33c84997261575 100644 (file)
--- a/lib/redmine/themes.rb
+++ b/lib/redmine/themes.rb
@@ -30,6 +30,8 @@ module Redmine
     
     # Return theme for given id, or nil if it's not found
     def self.theme(id, options={})
+      return nil if id.blank?
+      
       found = themes.find {|t| t.id == id}
       if found.nil? && options[:rescan] != false
         rescan