Make issue categories inheritable on subprojects (can be disabled in Admin -> Settings -> Projects).

git-svn-id: http://redmine.rubyforge.org/svn/branches/work@1060 e93f8b46-1217-0410-a6f0-8f06a7374b81

project_inheritance/app/models/project.rb

@@ -164,10 +164,16 @@ class Project < ActiveRecord::Base
   
   def assignable_versions
     v = versions
-    v +=  parent.versions if Setting.subprojects_inherit_versions? && parent
+    v += parent.versions if Setting.subprojects_inherit_versions? && parent
     v.sort
   end
   
+  def assignable_categories
+    c = issue_categories
+    c += parent.issue_categories if Setting.subprojects_inherit_categories? && parent
+    c.sort
+  end
+  
   # Returns the mail adresses of users that should be always notified on project events
   def recipients
     members.select {|m| m.mail_notification? || m.user.mail_notification?}.collect {|m| m.user.mail}