name the project_id parameter correct

app/controllers/members_controller.rb

@@ -127,7 +127,7 @@ class MembersController < ApplicationController
     # this way, mass assignment is considered and all updates happen in one transaction (autosave)
     attrs = params[:member].except(:user_id)
     attrs.merge! params[:membership].dup if params[:membership].present?
-    attrs.delete(:id)
+    attrs.delete(:project_id)
 
     role_ids = attrs.delete(:role_ids).map(&:to_i).select{ |i| i > 0 }
     roles = Role.find_all_by_id(role_ids)

app/views/projects/settings/_members.html.erb

@@ -71,7 +71,7 @@
 
 <div class="splitcontentright">
 <% if roles.any? && available_principals.any? %>
-  <%= form_for(@member, :url => {:controller => 'members', :action => 'new', :id => @project, :page => params[:page]},
+  <%= form_for(@member, :url => {:controller => 'members', :action => 'create', :project_id => @project, :page => params[:page]},
                         :method => :post,
                         :remote => true,
                         :loading => '$(\'member-add-submit\').disable();',