Fixed: error when removing a project member (postgresql and sqlite only).

git-svn-id: http://redmine.rubyforge.org/svn/trunk@1082 e93f8b46-1217-0410-a6f0-8f06a7374b81

app/models/member.rb

@@ -33,6 +33,6 @@ class Member < ActiveRecord::Base
   
   def before_destroy
     # remove category based auto assignments for this member
-    project.issue_categories.update_all "assigned_to_id = NULL", ["assigned_to_id = ?", self.user.id]
+    IssueCategory.update_all "assigned_to_id = NULL", ["project_id = ? AND assigned_to_id = ?", project.id, user.id]
   end
 end